-Is Jack on duty today?-It ____ be him. It’s his turn tomorrow.
#87485
A
mustn’t
B
won’t
C
can’t
D
needn’t
推荐题目
—Need I accomplish all we have set out to do?—Yes, you ____; otherwise you ____fired.
#86820
A
need; would have been
B
may; need have been
C
can; mustn't have been
D
must; would be
I______Professor Jones had taught me this question. 
#89919
A
believe
B
deeply think
C
wish
D
suppose
I was admitted into a famous university. My success      me pleased with myself, but I didn’t.
#86946
A
might have made
B
might make
C
should have made
D
should make
The old lady insisted that her daughter ____ still alive and that she ____ at once. 
#87084
A
was; was operated
B
was; be operated
C
should be; should be operated
D
be; should be operated