单项选择题

The mother didn't know（）to blame for the broken glass as it happened while she was out.

A. who
B. when
C. how
D. what

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单项选择题
Up（）into the air.

A. went the arrow
B. the arrow went
C. did the arrow go
D. does the arrow go
单项选择题
Go through the gate and you'll find the entrance（）Bear Country on the other side.

A. to
B. of
C. in
D. on
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