Ⅰ.单句语法填空
1．She is really angry. You oughtn't to (couldn't/oughtn't to) have spoken to her in such an unfriendly way just now.
2．—Shall I tell my friend Tom about it?
—No, you needn't (mustn't/needn't)．I've already told him yesterday.
3．You're John's good friend, so you must (must/have to) know what he likes to do at the weekend.
4．My mother's birthday is coming. What shall (shall/may) I buy for her?
