I have an exam next month. I hope someone can help me.

Topic: You are a member of a new creative writing group. You have been asked to write an imaginative story which you will read out to the group at the next meeting. Your story begins like this:
One day I fell asleep on the MTR and when I woke up, the train was empty. I got off the train, ran out of the station and saw that all the streets and the buildings were empty too. I couldn’t see anybody at all……
Finish the story.

                I was very scared. I was afraid whether I was dead. After I ran away the station, I could not find my way home. I was at a loss. I did not know next step what should I do.
                I carried straight on at no aim, but I still did not meet any people until walking along the beach where I hear some voices from the distance. I sneaked into there secretly. All of a sudden, I saw in front of me an enormous monster. I was so surprised that I wanted to scream. I opened my mouth but I could not shout. I was too frightened to shout. The monster grew bigger and bigger, I trembled helplessly.
               The monster discovered me and ran at me suddenly. I was afraid that the monster would bite me, so I ran away immediately. When I was running, I heard some voices that a quite few people cried for help. I turned round at once and found that they were bound at a distance and there was a sword on the beach. I screwed up me courage to run for getting the sword. The monster seemed to know my intention and tried to forbid my action. I ignored the monster to run for getting it. Finally, I got the sword. I drew out the sword to run at the monster instantly. The monster’s act was very rapid. However, I did not lose heart because I knew that the people need my saving. I still considered how can I defeat it. On considering, the monster attacked me all at once. I avoid it, I cannot but fought back rapidly and stabbed the monster continuously. At last, the monster was defeated by me, and then I relieved the people. But I fainted because I was very tired from that fight.
               After a while, I became conscious gradually. I thought that I would have many reward. I opened my eyes with happiness. It was pity that I was in the train all the way. It is a dream. I was extremely disappointed at that time because I overcame the monster very hardly. Besides, I found that I lost my much time in the train. I may be late for date with friends, who may scold me for late in a long time.

You're taking HKCEE?

Your basic grammar needs a lot of work, though you can avoid losing marks by trying simpler sentences and sticking to structures you're comfortable with.  Also, be careful about your tense consistencies. I also suggest you review your preposition lessons and this:

Question: What should I do? (I wonder what I should do.)

Question: How can I defeat my enemy? (I wonder how I can defeat my enemy.)

Hope that helps.

This looks like an average HKCEE paper (under the old marking scheme).

I highlighted only the things that will cost you a lot of points. Please look over them and correct them.

CoSmO_hk wrote:

One day I fell asleep on the MTR and when I woke up, the train was empty. I got off the train, ran out of the station and saw that all the streets and the buildings were empty too. I couldn’t see anybody at all…… Finish the story.                 I was very scared. I was afraid whether I was dead. After I ran away (prep) the station, I could not find my way home. I was at a loss. I did not know next step what should I do.                 I carried straight on at no aim (don't know what you're saying), but I still did not meet any people until walking along the beach where I hear (tense) some voices from the distance. I sneaked into (prep.) there secretly. All of a sudden, I saw in front of me an enormous monster. I was so surprised that I wanted to scream. I opened my mouth but I could not shout. I was too frightened to shout. The monster grew bigger and bigger, and I trembled helplessly.                The monster discovered me and ran  at me suddenly. I was afraid that the monster would bite me, so I ran away immediately. When I was running, I heard some voices that a quite (you need to break this up into two sentences if you don't know how to combine them) few people cried for help. I turned round at once and found that they were bound at a distance and there was a sword on the beach. I screwed (wording) up me courage to run for getting (try something simpler) the sword. The monster seemed to know my intention and tried to forbid my action. I ignored the monster to run for getting (try one word) it. Finally, I got the sword. I drew out the sword to run at (try another verb; get rid of "at") the monster instantly. The monster’s act was very rapid. However, I did not lose heart because I knew that the people need (tense) my saving. I still considered how can I defeat it. On considering, the monster attacked me all at once. I avoid (tense) it, I cannot but fought back rapidly and stabbed the monster continuously. At last, the monster was defeated by me, and then I relieved (wording) the people. But I fainted because I was very tired from that fight.                After a while, I became conscious gradually. I thought that I would have many reward. I opened my eyes with happiness. It was a pity that I was in the train all the way. It (tense) is a dream. I was extremely disappointed at that time because I overcame the monster very hardly. Besides, I found that I lost my much time in the train. I may (tense) be late for a date (wording) with friends, who may (tense) scold me for being late in a long time.