— I phoned you yesterday morning. A girl answered, but I didn’t recognize the voice.— Oh, it __________ my younger sister. She was in my room at that moment.
#62876
A
must have been
B
should have been
C
could have been
D
may have been
推荐题目
—Listen! Is that Pingping playing the guitar? —No. It __________be Pingping. He has gone to Beijing.
#76611
A
mustn’t
B
may
C
can’t
D
must
It was so dark outside that the little child ________ go out by himself.
#62941
A
dare not to
B
dared
C
dares
D
didn’t dare to
—Steve is good at writing short stories. — So he is. But he writes _______ than us. So he can’t get good grades in writing.
#77653
A
most carefully
B
more carefully
C
less carefully
D
least carefully
Some aspects of a pilot's job be boring, and pilots often work at inconvenient hours．
#63217
A
can ; have to
B
may ; can
C
have to; may
D
ought to; must
Now that the sign reads, “No person ______ smoke here”, please choose a seat in the smoking area over there if you _______ smoke.
#63408
A
must; shall
B
will; must
C
shall; must
D
can; should