It is you as well as your wife that ______ your son's bad performance at school.
| A．is to be blamed for | B．are to be blamed for |
| C．are to blame for | D．is to blame for |
I think that he must be looking up the information in the library, ______?
| A．isn’t he | B．don’t I | C．do you | D．must he |
I hope she gives up her job ______ it makes her crazy.
| A．before | B．until | C．as soon as | D．in that case |
I can’t advise you what to do; you must use your own ______.
| A．opinion | B．purpose | C．suggestion | D．judgement |
I don’t like talking on ______ telephone; I prefer writing ______ letters.
| A．a; the | B．the; 不填 |
| C．the; the | D．a; 不填 |
She keeps a supply of candles in the kitchen in case of power ______.
| A．drop | B．lack | C．failure | D．absence |