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1. — You should ______ careful in your work and life every day.

— You're right.

A. be B. are C. is D. am
【考点】
情态动词; 系动词be;
【答案】

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1. Both Kate's brothers and her sister ____ going to help her with the housework 
A. be B. is C. are D. am
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2. —Can you ride a horse, Tony?

—________.

A. Yes, I can B. Yes, I am C. No, I can D. No, he can not
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3. —____you ride a bike when you were eight? 

—Yes, of course.

A. Do B. Can C. Could D. Were
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