--This computer doesn't work, Sir.--Well, bring it back, _____

--This computer doesn't work, Sir.--Well, bring it back, ______ we'll return your money.

#55451

and

but

because

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If you have trouble pronouncing the word, you can repeat it over and over again _______ you are comfortable with it.

#55250

unless

until

while

More historical buildings in the old town will fall down ________we try our best to protect them.

#55384

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I have to leave now __ I can catch the last bus.

#56432

so that

because of

until

as soon as

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Don’t be crazy about Korean TV programmes, _________ your life will be in a mess.

#55609

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