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题型：单选题题类：常考题难易度：普通

——Tom, where is your father?　

——I'm not sure. He_______ in his office.

A、is B、may be C、maybe D、may

举一反三

You _________ get up so early. It's weekend today.

Look at the sign! It says “No Smoking!” You ________ smoke here. It's dangerous.

—Robert, could you wash the car for me?

—Yes, I ________. I'm coming, Dad.

Peter, when{#blank#}1{#/blank#}(be) your sister born?

You ______ be very tired with the long drive. Let's stop to have a rest.

The machine didn't work, so I had to {#blank#}1{#/blank#} (修理) it.

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