题目内容
用准确的介词或副词填空
Look out! The house is going to fall ________.
It seems that he is lost in something, for he has been sitting there ________ morning ________ night.
The number of people who speak Chinese ________ their mother tongue is the biggest.
He changed ________ the subway ________ a bus.
Compared ________ her mother, she is tall.
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