Take the exam carefully, _ _ you won't get good marks.
A. and B. or C. so D. but
The students_ _to be very strict with themselves in their study and work.
A.can B.may C.ought D.should
My brother can work out problems_ _ than any other student in his class.
A. quickly B. quick
C. more quickly D. quicker
The music in Voice of China sounds very_ _. I enjoy it very much.
A.well B.beautiful C.wonderfully D.boring
Some students enjoy raising pet dogs while_ _ don't agree with them.
A. the other B. another C. others D. the others
The twins have tried, but _ _ of them has got the chance to study abroad.
A. both B. all C. none D. neither
