—Listen!Helenissinginginthenex

—Listen ! Helen is singing in the next room.
—It __________ be Helen. She is in Tianjin now.

A．can’t

B．mustn’t

C．may not

D．shouldn’t

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相关试题

Be careful when you take exams. Check your paper to ________ there are no mistakes before you hand it in.

A．make sure

B．find out

C．think about

D．deal with

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— Can we ask Jeff for help with our English?
— You’d better not. He is the last person _______ others.

A．helps

B．helped

C．helping

D．to help

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— Could you tell me_____ ?
— About half an hour.

A．how long it takes to walk to the Science and Technology Museum from school

B．how long it took to walk to the Science and Technology Museum from school

C．how far was it to walk to the Science and Technology Museum from school

D．how far it was to walk to the Science and Technology Museum from school

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John _______ at his uncle’s for 3 days and he is now at home.

A．stayed

B．has stayed

C．had stayed

D．was staying

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—How well did Sally do in writing ?
—Among the students, she made the ________ mistakes.

A．fewer

B．fewest

C．less

D．least

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