单项选择题

“Do you hear someone knocking at the door？” “Yes， I did. I heard him ______ three times.”

A．knocking
B．knocked
C．being knocking
D．knock
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单项选择题
The sentence， “Some people do nothing but break the whole programme.” may tell us that ______.
A．radio stations use hotlines in a wrong way
B．it is a fact
C．it is a good idea
D．some people have unclear thoughts
单项选择题
According to the announcement， which of the following statements is correct？
A．Unemployment in July was higher than it had been since January.
B．Unemployment rose at a steady rate form January to July.
C．Unemployment rose by about 7% from June to July.
D．Unemployment rose about 7% the first time in July.
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