I really don’t know how to thank you , but for your help, I ______ my lost necklace.
#87790
A
couldn’t have found
B
mustn’t have found
C
couldn’t find
D
wouldn’t find
推荐题目
He ________ the exam, but he was too careless.
#86832
A
could have passed
B
couldn’t have passed
C
must have passed
D
may have passed
— Why! I _____ get you on the phone. — We ______ basketball on the playground when you phoned. 
#89278
A
didn't; must be playing
B
couldn't; must be playing
C
couldn't; must have played
D
didn't; must have been playing
His homework______, but it _____.
#90163
A
needs correcting; needn’t rewriting
B
need be corrected; doesn’t need to be rewriting
C
needs correcting; needn’t be rewritten
D
needs to be corrected; needn’t to be rewritten
 —It was cold and the road was icy. —It          a comfortable journey.
#87692
A
can’t be
B
shouldn’t be
C
mustn’t have been
D
couldn’t have been