单项选择题

Prior to our conference, the executive director had requested that everyone was well prepared.()

A. Prior to
B. conference
C. executive
D. was

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单项选择题

Although the danger that he might be injured, Smith bravely entered the burning house in order to save the boy.().

A. Although
B. be injured
C. bravely entered
D. in order

单项选择题

I would go to visit that beautiful lake but I couldn't get in touch with you while I was in Boston.().

A. would go to
B. but
C. couldn't
D. in touch

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