ToliveonMars,youneedtowearboot

To live on Mars, you need to wear boots which ________ to prevent you from floating off into space.

A．design	B．designed
C．are designing	D．are designed

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There are millions of websites on the Internet and there _______ a lot of useful _________on the websites.

A．are；informations	B．are；information
C．is；information	D．is；informations

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You will achieve nothing ________ you work hard.

A．if

B．unless

C．when

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—Oh, really? I think you should do well in______ of them.

A．both

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C．some

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—Yes, she’s a professor of_________ university.

A．the；a

B．a；an

C．the；an

D．/ ； the

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— ______ have you been away from your hometown, Jane?
— Since twelve years ago.

A．Howmany

B．Howlong

C．Howmuch

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