38頁19.must I return the book this afternoon ?

題目：

38頁19.must I return the book this afternoon ?
No ,you ---.but do you ---return it before supper ?
A.needn't ,must B.mustnt ,can C.mustn't may 理由

解答：

A你把這話背熟,下次考試就沒問題了.
記住了,加了do就是強調預期,後面跟上must或have to.