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题型：单选题题类：常考题难易度：普通

定冠词——用在逢十的复数数词之前，指某个年代

China was built in ______ forties.

A、an B、the C、a D、/

举一反三

— Talking with my parents is ______ difficult for me. They never understand me.

— Don't worry. Nothing is difficult if you try your best.

What did Cathy do last Sunday afternoon?

Mike began to work in the factory in 2013．He there for four years．

The World War was over in ______ forties.

My grandfather went to the USA in _______ twenties.

At the beginning of century, there were not so many cars on the streets.

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