单项选择题

We （） Edison's success to his intelligence and hard work.

A.subject
B.attribute
C.owe
D.refer

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单项选择题

I didn't sent our my application form last week,but I （）.

A.had to
B.should have
C.would do
D.might have to

单项选择题

Many tourists were （） by the city 's complicated traffic system.

A.degraded
B.bewildered
C.evoked
D.diverted

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