The government has taken some measures to solve the shortage of electricity, but it may be some time ________ we have enough power.
| A．since | B．after | C．unless | D．before |
相关试题
. 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 |
His composition won first prize, ______ made him too happy to sleep for nights.
| A．what | B．that | C．which | D．where |
We are waiting ______ for your absence.
| A．your explanation | B．to have your explanation |
| C．about your explanation | D．having your explanation |
With little knowledge about the area he succeeded ______ many researchers failed.
| A．the place where | B．in place | C．while | D．where |
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