There was a(n)________silence in the live interview，when no one knew what to say to the audience.
| A．ashamed | B．disappointed | C．desperate | D．awkward |
Water, which seems to be so simple and common, is ______ makes life possible.
| A．that | B．which | C．what | D．where |
William Shakespeare occupied a ______ position in English literature.
| A．most unique | B．unique | C．very unique | D．least unique |
We have been told that under no circumstances ______ the telephone in the office for personal affairs.
| A．may we use | B．we may use | C．we use | D．do we use |
—Tom is so worried about the test that he said he was going to study all night.
—Tell him he should quit ______ and get some help.
| A．to have worried | B．to worry | C．worrying | D．from worrying |
John didn’t feel well yesterday; otherwise he ______ to see his friend off at the airport.
| A．came | B．would come | C．would have come | D．should be coming |