单项选择题

During (the) discussion, Mr. Sam (remained) silent (when) a (sking his opinion).

A．the
B．remained
C．when
D．sking his opinion
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单项选择题
The book was so (bored) that I (returned) it (to the library) without (finishing) it.
A．bored
B．returned
C．to the library
D．finishing
单项选择题
(Let's not) waste time on matters (of no important). We have other (vital) problems to (deal with).
A．Let's not
B．of no important
C．vital
D．deal with
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