A. where B. when C. how D. what
5. - What did your parents think about your decision? - They always let me do _______ I think I should.
A. when B. that C. how D. what
6. Engines are to machines ________ hearts are to animals.
A. as B. that C. what D. which
7. I just wonder ________ that makes him so excited.
A. why it does B. what he does
C. how it is D. what it is
8. One advantage of playing the guitar is _______ it can give you a great deal of pleasure.
A. how B. why C. that D. when
9. He spoke proudly of his part in the game, without mentioning ________ his teammates had done.
A. what B. which C. why D. while
10. -It’s thirty years since we last met.
-But I still remember the story, believe it or not, ______ we got lost on a rainy night.
A. which B. that C. what D. when
11. There is much chance ______ Bill will recover from his injury in time for the race.
A. that B. which C. until D. if