Tom was walking along the riverside when he heard someone calling him from behind. He turned around______

Tom was walking along the riverside when he heard someone calling him from behind. He turned around_______ found nothing.

#56161

but

and

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____ he was rich, he gave little money to the others.

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Because

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don’t

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when

while

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The more...the more

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She is very heavy, ______ she never stops eating.

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