_____ Jim_____ his cousin has been to America, but both of them know the country well．
A. Not only, but also B. Both, and C. Neither, nor D. Either, or
— When did you go to bed last night?
— ____________ I finished my homework.
A. Until B. Not until C. When D. While
This piece of music is well worth ________. Many people like it very much.
A. listen B. to listen C. listening D. listening to
—I know smoking is bad for my health, ______ I just can’t give it up．
—Yeah, it is easier said than done．
A. for B. or C. but D. so
Andy found ______ to be a host at the charity show．
A. it’s excited B. it excited C. it’s exciting D. it exciting
—How much difficulty did you have this problem? —None ．It's quite easy．
A. to solve B. solved C. solving D. solves
