风化作用可分为物理风化作用、化学风化作用和生物风化作用三大类。()
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“We will do what we can to get the goods __________ on time,” said the manager of the company.
A. reached
B. arrived
C. delivered
D. come
He won’t go on doing the job __________ he gets his salary raised.
A. when
B. after
C. If
D. unless
The news has already __________ all over the country.
A. spent
B. spread
C. shocked
D. increased
It wasn’t as good a dinner __________ she had promised us.
A. as
B. that
C. which
D. what
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