We should do more such exercises in the future, I think, _____ those we did yesterday.
---Where _______ my book ? I can't see it anywhere. --- I _______ it on this table . But now it's gone . A were you putting ; have put B. had you put ; was putting C have you put ; put D. did you put ; have put
___we admit that there are still some problems about NMET, we don’t mean that it’s of no use.
Mr. Smith found that gas from the pipe when he came back because we forgot to switch off. But at last we were lucky to escape .
Human facial expressions differ from those of animals in the degree ______ they can be controlled on purpose.
With world economic crisis_________, people appeal to the government for more unemployment benefits.