单项选择题

In vain ______ to convince him.

A. I tried
B. tried I
C. did I try
D. was I trying
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单项选择题
His ______ book will deal with industrial relations.
A. actual
B. forthcoming
C. prompt
D. eventual
单项选择题
______ , she went back to sleep.
A. There was no cause for alarm
B. There being no cause for alarm
C. Without having cause for alarm
D. Being no cause for alarm
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