Walking exercises ____ be boring at times, but on a clear sunny morning nothing could be better.
#63356
A
may
B
will
C
must
D
should
推荐题目
—Can we leave the classroom now?—No, you _________. You _________ to leave until the bell rings.
#74081
A
don’t have to; are supposed
B
mustn’t; are allowed
C
needn’t; aren’t allowed
D
can’t; aren’t supposed
You ______ your coffee before it turns cold.
#76158
A
should drink
B
should drinks
C
should drinking
D
should to drink