Theystudiedwhatsince2007andfou

They studied what ______ since 2007 and found Australian electricity prices were among the highest in the developed world.

A．has happened

B．happened

C．had happened

D．has been happening

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I would appreciate ______ if you could write to me as soon as possible.

A．that

B．this

C．it

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A．put up with

B．put up

C．catch up with

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A．pressure

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---- I’m sorry to keep you waiting. I’ll make short of work of this.
---- . _______. I’m not in a hurry.

A．Go ahead

B．Not at all

C．Take your time

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For a long time they walked without saying ____ word. Jim was the first to break ____ silence.

A．a; the

B．the; a

C．a; /

D．the; /

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