问题描述：
he is not good at swim,so he s_____ goes swimming
is the dog ______(lie) on the ground?
Please tell your sister_____(come)here quickly.
She find it difficult ______(get) to sleep.
is the dog ______(lie) on the ground?
Please tell your sister_____(come)here quickly.
She find it difficult ______(get) to sleep.
问题解答：
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