题目内容
She wrote him a letter.
A letter was written ______ her.
She studies hard to keep up ______ her classmates.
用适当的介词填空：
She can't see the words ________ the blackboard.
介词填空：
She didn't come to school yesterday because ______ illness.
用适当的介词填空。
She saw a bird ________ the top of the tree near the lake．
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