20.---Did a letter come for me?

　 ---Yes,___came for you this morning.

A.that　 B.it　 C.one　 D.the letter

19.I told___to run as fast as___could.

A.them;one　 B.everyone;they　 C.everyone;one　 D.us;they

18.Do you doubt___she can do the work as her own?　

A.whether　 B.if　 C.which　 D.that

17.They stayed with me for three weeks,____they drank all the wine I had.

A. and during which　 B.which time　 C.during which time　 D.during whose time

16.___,he can’t cure his father of his heart disease.

A.A doctor as he is　 B.Doctor though he is

C.Although he is doctor　 D.Because he is a doctor

15.We must finish the project in time,____difficulties we may meet.

A.however B.whatever　 C.whichever　 D.no matter how

14.It was a matter of_____would take the position.　

A.who　 B.whoever　 C.whom　 D.whomever

13.You can use my bike___you return it　 before 5 pm.　

A.unless　 B.when　 C.as far as　 D.on condition that

12.---When will the decision be made to deal with the matter?

　 ---Nothing is going to happen___I have looked into it futher.

A.no matter　 B.when　 C.until　 D.since

11.There was a teapot shaped like a China duck,out of____mouth the tea was supposed to come.

A. which　 B.that　 C.its　 D.whose