1．My mother suggested that we should(should/will) go to the nature park this weekend.
2．If you earn more than 5，000 yuan, you have to(have to/can) pay tax(税)．
3．You can’t(can’t/needn’t) go to the wedding in that old shirt. It is out of fashion.
4．You ought to(ought to/will) give up smoking. It does no good to your health.
5．If you can lend me the money, I needn’t(shouldn’t/needn’t) go to the bank.
6．You oughtn’t to(oughtn’t to/won’t) go on working because you look so tired now.
7．You shouldn’t(shouldn’t/needn’t) laugh at her just because her English isn’t very good.
8．The students mustn’t(mustn’t/needn’t) make a noise in the reading room.
9．You’re John’s good friend, so you must(must/have to) know what he likes to do at the weekend.
10．You needn’t(couldn’t/needn’t) have taken a taxi here, for it was very near to my house.
