单项选择题

To wait in the queue for half an hour, the old man suddenly realized that he had left the wallet in the car.

A．To wait
B．for
C．realized
D．had left
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The Great Wall is So a well-known tourist attraction that millions of people pour in every year.
A．The
B．So a
C．tourist attraction
D．millions
单项选择题
A warm thought suddenly came to me which I might use the pocket money to buy some flowers for my mother’s birthday
A．came to
B．which
C．use
D．for
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