题目内容
It's always difficult to be in a foreign country,______if you don't speak the language.
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You should make it a rule to leave things______you can find them.
Suppose it is September 14th today, how many activities can people choose to attend？
______could be judged from his eyes, he felt terribly sorry for what he had done.
—______was it______they discovered the entrance to the underground palace？— Totally by chance.
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