Mr. Baker, a number of students want to see you. _______ they wait here or outside?
#63137
A
Should
B
Will
C
Could
D
Shall
推荐题目
My sister ______ an English teacher in our school. Now she works in America.
#77750
A
was used to be
B
used to
C
used to be
D
used to being
— Who’s singing in the next room? — It ______ be Mary. She ______ New York. 
#75016
A
mustn’t, is in
B
must, has gone to
C
could, has been in
D
can’t, has gone to
Today is Wednesday. He _______be at home. He ______ be at school.
#77314
A
can’t, can
B
can’t, must
C
mustn’t, must
D
mustn’t, can