The teacher asked us so much noise．
| A．don’t make | B．not make | C．not making | D．not to make |
Since nobody gave him any help，he ________ have done the research on his own.
(2013·大纲全国，26)
| A．can | B．must |
| C．would | D．need |
My mom suggests that we ________ eat out for a change this weekend. (2013·陕西，12)
| A．should | B．might |
| C．could | D．would |
—Why are your eyes so red？You________have slept well last night.
—Yeah，I stayed up late writing a report. (2013·四川，5)
| A．can’t | B．mustn’t |
| C．needn’t | D．won’t |
I should not have laughed if I________you were serious. (2013·江苏，30)
| A．thought | B．would think |
| C．had thought | D．have thought |
It ________be the vocabulary that caused you the problem in the exercise because you know a lot of words. (2013·安徽，34)
| A．may | B．couldn’t |
| C．should | D．needn’t |