题目内容：

Let's go to the post office by bike,____ ___?(反意疑问句）

优质解答

Let's go to the post office by bike,shall we?Let's ...侧重双方意见,包括说话人和听话人双方,所以用shall we?
Let us ,如果这样写,则用,wiil you? 因为侧重听取对方意见.