单项选择题

The boy has formed the habit of ______ at everything before he starts eating it.

A．sneezing
B．tasting
C．sniffing
D．sipping
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单项选择题
ff the soldiers move to that area, they would be exposed ______ great danger.
A．with
B．by
C．to
D．in
单项选择题
Salmon can return to its birthplace ______ having to roam the vast oceans.
A．except for
B．in spite of
C．without
D．against
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