I’m sorry, Bill. I _________ the book to you last week, but I was so busy that I forgot to do so.
#63435
A
must have returned
B
could return
C
should have returned
D
might return
推荐题目
 This book ______ , because his name is on the book. 
#74799
A
can be Tom’s father’s
B
can’t be Tom’s father’s
C
must be Tom’s father’s
D
must be Tom’s father
--- Can you make a kite for me?--- Sorry, I _____.
#75948
A
needn’t
B
can’t
C
mustn’t
D
shouldn’t