题目内容
请根据句意从方框中选择合适的动词，并用其适当形式填空，使句子通顺。
introduce cover sell not drop kill
1.If it keeps snowing like this, the snow _______________ everything soon.
2.____________ rubbish on the ground. Keep the school clean.
3.The children _____________ themselves to each other in the classroom. Why not go and listen to them?
4.A dolphin seldom ____________ people. Instead, it can show the way in the sea.
5.My parents ______________ our old flat and bought a new one last year.
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