Therearestillmanyproblemsbefor

There are still many problemsbefore we are ready for a long stay on the Moon.

A．	solving	B．	solved
C．	being solved	D．	to be solved

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相关试题

26 .It is believed that if a book is _______, it will surely ______ the reader.

A．interested; interest	B．interesting; interest
C．interesting; be interested	D．interested; be interesting

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25. Many parents find it hard to _______ to their children when they are teenagers.

A．understand

B．connect

C．relate

D．Talk

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24.The terrorists said that anyone caught ______ on them would be killed.

A．attacking

B．fighting

C．knocking

D．Informing

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23.—How did you find the lecture tonight？
—It ____ me. I doubt if I will come for his lecture next time.

A．encouraged

B．disappointed

C．reflected

D．Satisfied

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22.In general， the old man is generous. But ____， he was mean to an old beggar.

A．at once

B．once again

C．for once

D．once over

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