27．—I can’t find Fred．He is not at home．
—Why don’t try______him?
| A．phoning | B．to phone | C．phone | D．having phoning |
相关试题
36. How can you know whether you will succeed ______ you never try?
| A．in case | B．when | C．unless | D．even if |
35. It was the fifth time that he ______ to such a meeting.
| A．have been invited | B．was invited | C．had invited | D．had been invited |
34. The villagers, ______ damaged by the flood, were given help by the International Red Cross.
| A．all whose houses | B．all their houses | C．all of whose houses | D．their all houses |
33. It is necessary that whoever ______ recently visited the country ______ this kind of test.
A．h as; pass |
B．has; passed | C．have; pass | D．has; passes |
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