Washington ______ get very hot and sticky in summertime. July and August are usually the warmest months.
#63183
A
must
B
can
C
should
D
might
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You _______ cross the road when the traffic lights are red.
#74937
A
can
B
must
C
mustn’t
D
needn’t
(2013·湖南长沙四校二模)—Is the letter from your mother?—Yes.But she ________the letter herself,because she doesn’t even know one word.
#62192
A
needn’t have written 
B
can’t have written
C
might not have written
D
should not have written
She __________ be here. I saw her come in.
#77390
A
can
B
may
C
should
D
must
----May we leave the classroom now?----No, you         . You           to leave until the bell rings.
#75525
A
mustn’t; are allowed
B
can’t; aren’t allowed
C
don’t have to; are allowed
D
needn’t; aren’t allowed