Question

-- It's very hot outside.
---Why          you stay at home?
A. not         B. not to     C. don't

Answer 1

C

試題分析：根據(jù)語境可知此句考查的是固定句型結(jié)構(gòu)why don’t you do sth意思是為何不…表示的是建議相當(dāng)于why not do sth。故選C。
點評：表示建議的句型結(jié)構(gòu)很多，常用的是why not do sth，shall we do sth，you’d better do sth和let’s do sth等.