19. I don’t know why he blamed the accident _____ me.
| A．at | B．to | C．for | D．On |
In most western countries on April Fool’s Day，people often play________ trick on each other；children especially have great________ fun.
| A．a；a | B．the；the | C．/；a | D．a；/ |
—Thank you very much for helping me out of trouble，Bob.
—________.
| A．With pleasure | B．Don’t mention it |
| C．That’s right | D．I hope so |
“ Will you repeat the question?”“ Certainly. It’s certain that you _____ attention.”
| A．didn’t pay | B．don’t pay | C．weren’t paying | D．aren’t paying |
_____ you’ve a chance, you might as well make full use of it.
| A．As soon as | B．Though | C．Now that | D．After |
She started as an office junior and _____ became director of the whole company.
| A．in time | B．on time | C．in turn | D．in return |