Thereisanaturalphenomenonscien

There is a natural phenomenon scientists call the greenhouse effect.

A．that

B．what

C．for which

D．who

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相关试题

The teacher tells his students to read the novel over and over again until they ______ it.

A．understand	B．understood
C．have understood	D．have been understood

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"It’s ______ warm today, let’s go swimming."　　　　
"No, I don’t ______ to do. It’s ______ cold today.

A．rather, hope, fairly	B．fairly, want, rather
C．rather, think, fairly	D．fairly, like, fairly

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----I have never heard it _____ before. And you ?
----The same as you.

A．talking about

B．talked

C．talked of

D．being talked

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In the dark street, there wasn’t a single person _____ she could turn for help.

A．to whom

B．who

C．from whom

D．that

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We found Mary’s brother to have _____ more story books than Ann’s.

A．much

B．too much

C．by far

D．far

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