According to the air traffic rules, you______switch off your mobile phone before bearding.
#89102
A
may
B
can
C
would
D
should
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Smith was overweight, so the doctor urged that not only ________ have less fat and meat, but also he ________.
#87544
A
should he; take exercise
B
ought he; take exercise
C
he should; takes exercise
D
he ought; takes exercise
— We expected you yesterday.— I’m sorry, I        you to say that I couldn’t be here until today.
#87786
A
must have called
B
would be calling
C
could have been calling
D
should have called