解析 句意为：这是办公室！因此你必须知道吃的不允许带到这里。must表示“绝不”的意思。

5. (09海南25)

What do you mean, there are only ten tickets? There be twelve A. should 答案 A

解析 你这是什么意思，只有十张票吗?应该有十二人。should表示“应该，应当”。 6. (09上海27)

It_____ have been Tom that parked the car here, as he is the only one with a car. A. may B. can C. must D. should 答案 C 7. (09四川13)

—I don’t care what people think. —Well, you _______

A. could B. would C. should D. might 答案 C

解析 考查情态动词的用法。答话的人提了一个建议——你应该关注别人对你的评价的。should可以用来向别人提建议，所以答案为：C 8. (09天津15)

This printer is of good quality. If it _______ break down within the first year, we would repair it at our expense.

A. would B. should C. could D. might 答案 B 9. (09重庆32)

—Hi, Tom. Any idea where Jane is?

—She_____in the classroom. I saw her there just now.

B. would C. will D. shall