—Look at the boy running on the ground. Is it Davis?—It ______ be him. I saw him go to the teacher’s office just now.
#74465
A
mustn’t
B
can’t
C
could
D
might
推荐题目
--Has Mr. White arrived, Tom?--Yes, sir. _____ he come in to see you right now?
#62360
A
Shall
B
May
C
Can
D
Must
All of us must do_______ to help protect the environment，or we will have more hazy weather雾霾天气.
#74653
A
something useful
B
anything useful
C
useful something
D
useful nothing
(2013·江苏南通市二模)We ________ have hurried all the way to the airport — the flight was called off because of the foggy weather.
#62421
A
mustn't
B
couldn't
C
needn't
D
wouldn't