A.How are you？B.I’m fine.Thank you.C.How do you do？D.Ni……

单项选择题As there was a power failure in the hospital, the doctor had to （）operation.

A.call for
B.call off
C.call on
D.cal lout

单项选择题Television keeps us informed about （）events and the latest developments in politics and science.

A.current
B.past
C.favorable
D.new

单项选择题Such problem （）air, water, and noise pollutions are becoming more and more serious in some big cities.

A.like
B.as
C.of
D.about

单项选择题I really hope that you will （）your trip to Canada and get back as soon as possible when people have to knowledge of the law.

A.prefer
B.refer
C.enjoy
D.i nfer

单项选择题He said that he was （）aware of the difficulty of being a father.

A.highly
B.fully
C.soundly
D.firmly