2019年mpa考试英语真题——虚拟语气537

{01}You__________buy a gift, but you can if you want to. A.must B.mustn"t C.have to D.don"t have to 解析：略
本题选D。
{02}.He is really incompetent! The letter ______ yesterday.
a. should be finished typing    b. must be finished typing
c.must have finished typing    d. should have been finished typing
解析：略
本题选d。
 
{03}.I’m sorry, but I had no alternative. I simply ______ what I did.
a. must do   b. had to do   c. ought to have done    d. have to do
解析：略
本题选b。