单项选择题

The birchbark canoe is not as ______ as it appears; it is built to withstand long journeys over rough waters.

A．solid
B．fragile
C．tough
D．sturdy
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单项选择题
Mr. Bridges mentioned briefly several other subjects in the course of his talk but mostly kept himself to the main topic.
A．touched off
B．touched down
C．touched on
D．touched up
单项选择题
Realizing that many readers find long descriptive passages uninteresting, Bruce began his story with an exciting conflict.
A．melancholy
B．tedious
C．incredible
D．offensive
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