题目内容
2．Let's a noise，someone is sleeping．（ ）| A． | not make | B． | no making | C． | not to make |
分析 让我们不要制造噪音，有人正在睡觉．
解答 答案：A 根据"someone is sleeping"，可知有人在睡觉，前面的祈使句是说不要制造噪音．根据let's的用法（其后加动词原形），可知其否定句为let's not do sth．故选A．
点评 本题考查非谓语动词．否定形式为一般是在动词原型前加助动词+not构成．但是let's构成的祈使句变为否定，要在let's后加not do
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