Hehadtopausefromtimetotimetowi

He had to pause from time to time to wipe the sweat from his forehead, because the air—conditioning system ______________.

A．broke in	B．broke up
C．broke out	D．broke down

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-----Alice, you clean the blackboard today, _________?
----- But I cleaned it yesterday.

A．won’t you

B．will you

C．didn’t you

D．don’t you

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--- Why is the cake so expensive?
---- Maybe you don’t know a cake made of wheat costs less than _____ made of rice.

A．one

B．that

C．the one

D．another

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I _____ sooner but I didn’t know that they were waiting for me .

A．had come

B．was coming

C．would come

D．would have come

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Experiments of this kind ___in both the U．S and Europe well before the Second World War．

A．had conducted	B．have conducted
C．have been conducted	D． had been conducted

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The situation forced my mother and I exchanged our roles as child and caretaker, making me grow up much faster than the _____ child.

A．average

B．ordinary

C．common

D．usual

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