She is always listening to music ___

She is always listening to music ____doing her homework.

#56689

while

until

though

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Plane will be very large _______ flying will be very cheap.

#57924

and

but

People cut down too many trees, _____ the greenhouse effect becomes more and more serious.

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because

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I won’t pass the exam ______I work hard.

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whenever

because

unless

The visitors         our factory two days ago.

#56089

got

reached in　　

arrived 　　

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Mr. Zhou was really anxious _____he can’t find his car.

#55718

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because

though

until

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