相关考题
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单项选择题
A secretary’s job isn’t always easy （）
A.of to do
B.to do
C.for doing
D.of doing -
单项选择题
You are not concentrating on which fork （）
A.use
B.be use
C.use to
D.to use -
单项选择题
The new suspension bridge （）by the end of last month.
A.has been designed
B.had been designed
C.was designed
D.would be designed
