---Look! _________ clean the classroom looks !
---Yes. I’m sure somebody __________ it up.
A．What , has cleaned
B．How , cleaned
C．What , cleaned
D．How ,has cleaned
Wars are disasters. A large number of people will lose their homes if a war .
A. breaks out B. breaks down
C. breaks up D. breaks off
---How do you like the story?---Interesting,_______ the end of it is not perfect.
A. though B. so
C. or D. because
You are working too hard. You’d better keep a__________ between work and relaxation.
A. promise B. secret
C. balance D. diary
Some people won’t realize the value of their health ________they lose it.
A. after B. until
C. as D. when
Jackie Chan played the lead role ______an excellent policeman _____the film.
A. for, of B. of, of
C. of, in D. of, for
