I ________ work out the problem at first, but after my teacher showed me an example, I ________ get the answer easily.
A.couldn’t; was able to | B.can’t; could |
C.wasn’t able to; could | D.was able to; was able to |
______________should be paid to our study,and only in this way ________make progress.
A.Heart;we can | B.Mind;can we |
C.Attention;can we | D.Notice;we can |
This machine is very easy . Anybody can learn to use it in a few minutes.
A. operating | B. to be operating | C. operated | D. to operate |
Don’t handle the vase as if it _________ made of steel.
A.is | B.were | C.has been | D.had been |
In order to find the missing child, the villagers___________ all they can in the past five hours.
A.have been doing | B.did | C.do | D.had done |
With a lot of problems _________,the manager felt like a cat on hot bricks.
A.solved | B.solving | C.to solve | D.being solve |