The biggest problem for most plants, which ______ just get up and run away when threatened, is that animals like to eat them.
#90173
A
shan’t
B
can’t
C
needn’t
D
mustn’t
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According to the air traffic rules, you ___ switch off your mobile phone before boarding.
#87048
A
may
B
can
C
would
D
shall
If you want to book tickets for the 2012 Olympic Games, just call 60952012. It _____be simpler.
#87242
A
mustn't
B
won't
C
needn't
D
couldn't
Smith was overweight, so the doctor recommended that not only have less fat and meat, but also he .
#87124
A
should he; take exercise
B
ought he; take exercise
C
he should; takes exercise
D
he ought; takes exercise