--- Where is Jack? I can’t find him anywhere.--- He ______ his homework upstairs.
#63513
A
might have done
B
must have done
C
might be doing
D
must do
推荐题目
--Whose T-shirt is this? --It ____ be John’s. It’s ______ small for him. 
#74475
A
can ’t; much too
B
can ’t; too much
C
mustn’ t; much too
D
mustn’t; too much
—Must I water the flowers now?  —No, you ________ . You __________ do it later.
#74201
A
mustn’t, must
B
mustn’t, may
C
needn’t, may
D
needn’t, must