When you are done with the book, just give it to Lucy or Helen or __________.
| A．whoever | B．wherever | C．whatever | D．however |
If we ___________some measures, we might have prevented the environmental pollution.
| A．take | B．had taken | C．took | D．have taken |
–May I smoke in the room?
--No, you______________. It’s a non-smoking room..
| A．mightn’t | B．won’t | C．needn’t | D．mustn’t |
---It’s a long time ______ I last saw you.
---Yes, and it will be another month ______ we can meet again.
| A．before; when | B．when; since | C．since; while | D．since; before |
John received an invitation to dinner, and with his work ________, he gladly accepted it.
| A．finished | B．finishing | C．having finished | D．was finished |
-–She looks very happy. She ________have passed the exam.
--I guess so. It’s not difficult after all.
| A．should | B．must | C．could | D．might |