I ________ work out the problem at first, but after my teacher showed me an example, I ________ get the answer easily.
#63120
A
couldn’t; was able to
B
can’t; could
C
wasn’t able to; could
D
was able to; was able to
推荐题目
--- ______ I bring you all the magazines right now?--- No, you don’t have to, but you ______ give them to me tomorrow.
#74955
A
May; can
B
Should; must
C
Can; can
D
Must; had better
We _______the letter yesterday, but it didn”t arrive.
#63105
A
must receive
B
ought to receive
C
must have received
D
ought to have received
(2013·四川省都江堰市二模)—Mike, I can't find my watch anywhere.—You ________ it while working out.
#62422
A
may have lost
B
could have lost
C
would have lost
D
should have lost
--Morn, must I clean my room now? --No, you . You can do it tomorrow.
#76387
A
can't
B
needn't
C
mustn't
D
shouldn't