Aboutseventypercentofourearthb

About seventy percent of our earth _______ by water.

A．is covering	B．is covered
C．are covered	D．are covering

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What is the best way __________ the question?

A．answer

B．answering

C．to answer

D．to answering

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I find it _____ that I can’t speak English well.

A．frustrate

B．frustrating

C．frustrated

D．to frustrate

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.I used to ______ a lot of time __________ games with my friends.

A．take; to play

B．cost; playing

C．spent; on

D．spend; playing

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---It’s good for you to _______ in class.
--- I think so. Thank you.

A．get into trouble

B．make a lot of noise

C．laugh at others

D．take notes

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I can’t afford ______ the white car, it’s too expensive.

A．to buy

B．buying

C．in buy

D．in buying

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