Sometimes smiles around the world ________ be false, hiding other feelings like anger, fear or worry.
#63470
A
must
B
can
C
should
D
would
推荐题目
--- May we leave the classroom now? --- No, you ____________ . You ____________ to leave before the bell rings.
#78161
A
mustn’t, are allowed
B
don’t have to, are allowed
C
needn’t, aren’t allowed
D
can’t, aren’t allowed
You       buy a gift, but you can if you want to.
#62926
A
must
B
mustn't
C
have to
D
don't have to