31．Laura was asked several questions, but she couldn't answer ______ of them．
| A．none | B．either | C．neither | D．Any |
.Teachers recommend parents their children under 12to ride bicycles to school for safety.
| A．not allow | B．do not allow | C．mustn’t allow | D．couldn’t allow |
. If he __________my advice, he wouldn’t have lost his job.
| A．followed | B．should follow | C．had followed | D．would follow |
.（湖南卷23）. You_________ buy a gift , but you can if you want to.
| A．must | B．mustn’t | C．have to | D．don’t have to |
. ---I haven’t got the reference book yet, but I’ll have a test on the subject next month.
---Don’t worry. You______ have it by Friday.
| A．could | B．shall | C．must | D．may |
．（江苏卷34）. George is going to talk about the geography of his country, but I’d rather he_______ more on its culture.
| A．focus | B．focused | C．would focus | D．had focused |