—Must I buy lunch at school?—No, you needn’t. You __________ bring your own lunch if you want to.
#75813
A
should
B
must
C
will
D
can
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Do you think the plan _________ out as soon as possible?
#63589
A
should carry
B
ought to be carried
C
ought to have carried
D
ought to have been carried
My sister met him at Ningbo Grand Theatre yesterday afternoon, so he         your lecture. 
#63615
A
couldn’t attend
B
mustn’t have attended
C
shouldn’t attend
D
couldn’t have attended