For our middle school students, some courses are compulsory, while others are ________.
#19297
A
flexible
B
optional
C
impressive
D
significant
推荐题目
When the man came in, gun in hand ,we all stood there,______.
#18251
A
astonishing
B
being astonished
C
astonished
D
having astonished
I have been convinced that the print media are usually more ____ and more reliable than television.
#18322
A
shallow
B
ridiculous
C
urgent
D
accurate
Everything is so expensive now.It is hardly ___ to save money.
#20294
A
probable
B
likely
C
possible
D
feasible