答案：D may表示“可以(允许)”时的否定回答，如果是表示“不允许(禁止)”要用情态动词mustn't；如果表示“不需要”要用needn't或don't have to。故应选D。
6．(2019·黑龙江哈尔滨第六十九中学中考二模)—May I step on the grass? —No, you ________. Look at the sign “Keep off the grass”. Everyone should be responsible for protecting the environment.
A．may not C．needn't
B．mustn't D．shouldn't
答案：B may表示“可以/允许”时的否定回答如果是表示“不允许/禁止”要用情态动词mustn't，故选B。
Ⅱ 用所给单词的适当形式填空 1．He ________ (not like) oranges. 答案：doesn't like
2．Here ________ (be) some cards, are they yours? 答案：are
3．She ________ (dare) not perform ballet in the front of the class. 答案：dare
4．Ice cream is not good for health, but it tastes ________ (well)． 答案：good
5．She talked too much yesterday and ________ (do not) drink enough water. 答案：didn't
6．What beautiful ________ (shoe) he is wearing! 答案：shoes
7．________ (not talk) to others like that. It's impolite. 答案：Don't talk
8．—Lin Jia, you have a loving grandma, right?
—Yes, she always ________ (spend) her time with me whenever I need her. 答案：spends
9．—When ________ the plane ________ (take) off? —At 2：00 this afternoon. 答案：will; take
10．Spring is coming. Everything seems ________ (be) lively, such as new green trees, beautiful flowers and warm sunshine.
答案：to be
Ⅲ 根据汉语完成句子 1．向一杯水里加些盐。
________ some salt ________ a glass of water. 答案：Add; to
2．最后，水变成了冰。
Finally, the water ________ ________ ice. 答案：turns into
3．我们必须在午饭前自己完成这项工作。
The work ________ ________ ________by ourselves before lunch. 答案：must be finished/completed 4．中学生不该依赖父母太多。
Students shouldn't ________ ________ their parents too much. 答案：depend on
5．这部情景喜剧是多么的精彩啊！我们都喜欢它。 ________ ________ the sitcom is! We all like it. 答案：How wonderful
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