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
The top of the hill is _________,but the trees grow part way up its slope.
#20578
A
empty
B
vacant
C
blank
D
bare
A ______ person always tries to finish the job, no matter how hard it is.
#18891
A
stubborn
B
determined
C
reliable
D
remarkable
----Why didn’t you come to meet me, Bill?----Sorry, dear. But I really forgot where I was _____ to meet you.
#17698
A
demanded
B
supposed
C
delighted
D
squeezed
His answer was _______, so no one could make out what he meant.
#59572
A
ambiguous
B
unconscious
C
transparent
D
explicit
The building is _____.
#19924
A
twenty-metre-high
B
twenty metre high
C
twenty-metres-high
D
twenty metres high