I'm not a teacher, but I hope I can help you. ![Smile [:)]](/emoticons/emotion-1.gif)
1. Mathematics has never been my favourite subject. Correct.
2. The news printed in that paper is never accurate.Correct.
3. A second series of books on American literature is being planned by the publisher. Correct.
4. Two gallons of paint is all we need. Correct.
5. Ten minutes is too short a time to finish this test.Correct.
6. The goods are shipped yesterday. This should be "were", Hela. The "yesterday" puts the whole sentence into past tense.
7. The scissors were here a few minutes ago. Correct.
8. The proceeds of the sale are going to charity. Correct, although I would prefer, "The proceeds ... shall go to charity" or "... will go to charity"
9. Athletics has always been emphasized in this school. Correct.
10. The premises of the school have been cleared of students because of a bomb threat. Correct.
Hope that helps,
- Joy