A lot of exercise outdoors could _____ positive energy which helps you to reduce stress.
| A．give in | B．give off |
| C．give away | D．give up |
“ They went to the lecture, but it had been put off.” “ Oh, so they _______.”
| A．needn’t have gone | B．should have gone |
| C．mustn’t have gone | D．don’t need to go |
The book I borrowed from the library isn’t here. Who __________?
| A．could have taken it | B．must have taken it |
| C．might take it | D．should take it. |
“______ you go so soon?” “ No, I ______ go yet.”
A Must; mustn’t B. Shall; won’t C. Can; may not D. Must; needn’t
Let’s sing a song, ______ we?
| A．will | B．can’t | C．shall | D．do |
The boss say to the secretary, “ If you work well, you _____ have a rise.”
| A．shall | B．would | C．must | D．ought |