(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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—The research on the new flu virus vaccine is challenging and demanding. Who do you think can do the job? —______ my students have a try?
#62920
A
May
B
Must
C
Will
D
Shall
—What does the sign over there read?—No person smoke or carry a lighted cigarette, cigar or pipe in this area.
#63185
A
will
B
may
C
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Walking exercises ____ be boring at times, but on a clear sunny morning nothing could be better．
#63356
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may
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will
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must
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(2014·山东省实验中学一模)You________get an allexpensepaid vacation to Australia if you can answer all the questions.
#62193
A
must
B
can
C
shall
D
may