1.Being a good leader，one ______ to think more of others.
A. must
B. may
C. ought
D. should
2.It‘s quite ______ me why such things have been allowed to happen.
A. for
B. behind
C. against
D. beyond
3.The factory manufactures a ______ of products.
A. variety
B. mixture
C. quality
D. volume
4.He continued speaking，regardless ______ my feelings.
A. in
B. of
C. on
D. about
5.If traffic problems are not solved soon，driving in this city ______ impossible.
A. become
B. becomes
C. will become
D. has become