Let's have our hair [ ],[ ]?A;cut,will you B;to cut, won't we C;cutting,won't you D; cut,shall we必须有理由

Let's have our hair [ ],[ ]?A;cut,will you B;to cut, won't we C;cutting,won't you D; cut,shall we必须有理由
Let's have our hair [ ],[ ]?
A;cut,will you B;to cut, won't we C;cutting,won't you D; cut,shall we
必须有理由

Let's have our hair [ ],[ ]?A;cut,will you B;to cut, won't we C;cutting,won't you D; cut,shall we必须有理由
D
have one's sth done是固定用法,而cut的过去分词是原形
Let's的反意疑问句是shall we

A;cut,will you
have one's sth done是固定用法，而cut的过去分词是cut
Let's的反意疑问句是will you