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
点击查看答案&解析
相关考题
-
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
