(2013·安徽师大附中高三七模)Don't use water to put out the fire if oil catches fire. As is known, oil ________ float on water.
#62449
A
shall
B
must
C
may
D
will
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If you work hard and finish it this week, you _______ have Monday free next week.
#63600
A
shall
B
will
C
would
D
should
--I have to go now to pick up my daughter.--If you ________ go, at least wait till the rain stops.
#62594
A
can
B
may
C
should
D
must
— Listen! Helen is singing in the classroom.—It _______ be Helen. She has gone to Shanghai.
#74428
A
mustn’t
B
may not
C
can’t
D
should
—Hi, Johnson, any idea where Susan is?—It's class time, so she in the classroom now.
#63533
A
can be
B
must have been
C
might have been
D
should be
—Dad, must I do my homework now?—No. You_____play games with your friends for a little while.
#78172
A
would
B
needn’t
C
may
D
don’t have to