About how many elements _____ make up most of the substances we meet in everyday

题型：不详难度：来源：

About how many elements _____ make up most of the substances we meet in everyday life

A．it is which

B．what it is

C．is it that

D．it is that

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举一反三

— What did she want to know, Tom?
— She wondered ____ we could complete the experiment

A．when was it

B．it was when that

C．it was when

D．when it was that

题型：不详难度：| 查看答案

On the contrary, I think it is Truman, you, to blame.

A．more than; are	B．less than; who are
C．rather than; that is	D．rather than; is

题型：不详难度：| 查看答案

In which play is _____ your brother appear?

A．that where

B．this when

C．it that

D．it where

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—I’d like a pen which _________ well.—Will this one _________?

A．writes; do

B．writes; work

C．is written; do

D．is written；work

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It is exactly we behave has changed the world：

A．which; that

B．how; that

C．how; what

D．what; that

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