They have arrived at lunchtime, but their flight was delayed.
A.will | B.can | C.must | D.should |
We must do whatever we can to ______the river from being polluted any more.
A.separate | B.keep | C.prevent | D.guard |
We should try our best to___________ those people after the disaster.
A.break out | B.come on | C.bring up | D.cheer up |
— I’d like to take a week holiday.
— ________, we are too busy.
A.Don’t worry | B.Forget it | C.Don’t mention it | D.Pardon me |
---Are you going to attend the meeting _____ next Saturday?
---I won’t unless invited.
A.being held | B.held | C.will be held | D.to be held |
________ excited Geoff Marcy most was ________ there were planets in other solar system where life might exist.
A.It; if | B.That; whether | C.What; whether | D.What; that |