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题型：单选题题类：常考题难易度：普通

广东中考人教新目标（Go for it）九年级Units7－9教材梳理

He ________ be in his office, for I left there just now.

A、can't B、may not C、mustn't D、don't have to

举一反三

—You must _____ a letter to your mother tomorrow.

—Well, I will, Dad.

— Health is important for everyone.

—Yes, we _________ take it seriously.

You be tired after walking for such a long time. Sit down and have a rest.

Dirty air and water are harmful. They ____ kill plants, and even people.

It's nearly eight o' clock. Bruce ___be here at any moment

Nowadays all passengers ___________ go through safety check before they take a train.

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