题目内容

"I’m afraid you can’t sit here." "Sorry, I ______ know."

A. don’t
B. can’t
C. won’t
D. didn’t

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Over the past 16 years, the population of the Amish People _____ to 230,000 with roughly 5 children per family.

A. had nearly doubled
B. has nearly doubled
C. nearly doubled
D. has nearly been doubling

How was the journey?Tiring. I caught the train at the last second, but all the seats ____. I stood all the way.

A. had been occupied
B. had occupied
C. would occupy
D. would be occupied

He ____ football regularly for many years when he was young.

A. was playing
B. played
C. has played
D. had played

网络经济中的竞争呈现出新的特点，主要有：（）

A. 门槛降低导致竞争更加激烈
B. 竞争使产品的生命周期缩短
C. 竞争方式更趋向于合作式竞争
D. 竞争从产品差异化走向标准化