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Help me to complete this sentence. The answer options were underlined.

1. Ray, whose / whom / which / who's class is nearby, will be able to walk to work.

2. My parents will be going to the Japan to attend my sister’s graduation at / by / in / on March.

3. After using them, please return the books to there / them / its / their proper place.

4. Traffic was backed on / in / up / out for seven kilometres as a result of an accident on the main road.

5. You shouldn’t / needn’t / mustn’t / can’t have handed the report in today. The deadline has been extended until next month.

6. I’m afraid I can’t go out tonight since I have some / many / much / few work to do.

7. Much of the machinery on these farms are / has / is / were unusable.

8. By the late 1990s, cell phones had become unanimous / usurp / untimely / ubiquitous and people had long ceased to be impressed by the sight of one.

9. The computer together with all the important documents for the presentation was / were / is /are destroyed in the heavy flood.

My answer :
1. whose
2. on
3.their
4. out
5. needn't
6. few
7. were
8. untimely
9. were

Please correct me if I am wrong.
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Comments  (Page 2) 
I thought untimely means too fast. In this context, the technology of the cell phone growing to fast.

Look at the rest of the sentence:
"...
and people had long ceased to be impressed by the sight of one."

That is, they were so common, they were no longer a new wonder of the age.
ubiquitous: present, appearing, or found everywhere
7. Much of the machinery on these farms are / has / is / were unusable.
Why did you choose is instead of are? Is it because of the word much at the beginning of the sentence?

'much' means 'a large amount', as opposed to 'more' and 'most', which refer refer to number.
'machinery' is uncountable. Whether you have one tractor, or a tractor and cement mixer, it is still 'machinery' and not 'machineries'
So 'much' takes a singular verb: Much of the machinery is...

compare:
Much of the machinery on his farm was damaged.
More of the machinery on his farm was damaged than mine.
Most of the machinery on his farm was damaged.
But...
Much of the people were hurt in the accident. INCORRECT
More of the people were injured in the accident than at first thought.
Most of the people in the accident were injured.

9. The computer together with all the important documents for the presentation was / were / is /are destroyed in the heavy flood.
For this question also, i think 'the computer with all the important documents' are plural.
No - when we use 'together with', we are lumping the computer and the documents together, as if one unit. Hence, we use a singular verb:
The computer was destroyed in the fire.
The computer (together with all the important documents for the presentation) was destroyed...
Site Hint: Check out our list of pronunciation videos.
It helps me a lot Mr Terryxpress. Thank you so much.

Regards,
Ryan

7 was wrong