—Do you know where David is? I couldn't find him anywhere.—Well, he ______ have gone far—his coat's still here.
Miss Woody made _____ clear that she would never have cooperation with that company.
No one in the factory but the brothers _____ that our factory will be closed because of the financial problem.
The girl left home after quarreling with her parents, _____ them quite worried.
Not until ___to do my homework ____ how much time I had wasted playing computer games.
He has made another wonderful discovery, _____ I think is of great importance to science.