单项选择
1.—Do you ______ wear school uniforms every school day?
—Yes, it’s the school rule, so we ______ choose our own clothes.
A. have to; mustn’t
B. must; can
C. have to; can
D. must; mustn’t
2.There ______ a set of rules and two new posters on the classroom wall now.
A. are
B. is
C. was
D. were
3.—Why don’t you leave now?
—I ______ go until I finish copying all the rules on the notebook.
A. can
B. mustn’t
C. have to
D. can’t
4.______ noisy in the library! Everyone ______ keep quiet here.
A. Don’t be; has to
B. Not be; must
C. Don’t be; have to
D. No being; mustn’t
5.—______ does your brother practice skateboarding every week?
—Twice a week, and he can do some difficult tricks now.
A. How long
B. How often
C. How soon
D. How much
6.Look! The little cat ______ behind the door, and it ______ not go out.
A. hides; must
B. is hiding; can
C. is hiding; can’t
D. hides; can’t
7.You ______ play with your mobile phone in class, but you ______ use it after school at home.
A. can’t; can
B. mustn’t; can
C. don’t have to; may
D. must; can’t
8.There ______ any rules for us to break if we follow the school orders carefully.
A. isn’t
B. aren’t
C. don’t have
D. doesn’t have
9.—Must I hand in my homework before 6 p.m.?
—No, you ______. But you ______ finish it before tomorrow morning.
A. mustn’t; have to
B. needn’t; have to
C. can’t; must
D. needn’t; mustn’t
10.Let ______ not ______ late for the training class again.
A. us; be
B. we; to be
C. our; being
D. us; to be
11.My skateboard is cool, and so are ______. They practice tricks together every weekend.
A. their
B. theirs
C. them
D. they
12.—Where is Tom?
—He ______ show the new student around the school yard now.
A. has to
B. must
C. is having to
D. is having to do
13.Don’t talk loudly, ______ you will disturb other students’ study.
A. and
B. but
C. or
D. so
14.You like ______ sports to keep fit, so ______ skateboarding is a good choice for you.
A. doing; do
B. doing; doing
C. to do; do
D. to do; does
15.—______ do you think of the school rules?
—They are strict but helpful, they make us better people.
A. How
B. What
C. Why
D. When
参考答案
1.A 2.B 3.D 4.A 5.B
6.C 7.B 8.B 9.B 10.A
11.B 12.C 13.C 14.B 15.B
1. 答案：A
解析：
第一空 have to 表示客观规定迫使必须穿校服，must侧重主观决心；
第二空 mustn’t 表示校规明令禁止自主选衣服。
句意：你们上学日必须穿校服吗？是的，这是校规，所以严禁穿自己的衣服。
2. 答案：B
解析：考查there be就近原则，be动词单复数由紧挨的第一个名词决定， a set of rules （一套规则）为单数，且时间now用一般现在时，故选is。
3. 答案：D
解析：固定结构 not…until… 直到……才……，
can’t leave = cannot leave，句意：我抄完笔记才能走。
mustn’t是“禁止”，语义不符合。
4. 答案：A
解析：祈使句否定形式： Don’t be + 形容词 ；
everyone作主语，谓语动词用单数，因此用 has to （客观必须保持安静）。
5. 答案：B
解析：
- How often：对频率（twice a week一周两次）提问
- How long：问时长/长度；How soon：问多久以后；How much：问价格/不可数名词数量
6. 答案：C
解析：Look! 是现在进行时标志，结构 be doing ，所以用is hiding；
can’t表示“不能、不敢出去”，逻辑通顺。
7. 答案：B
解析：
mustn’t 强调课堂纪律严格禁止玩手机；
can表示放学后可以使用手机，语气最合适。
can’t只是单纯“不能”，没有禁令的含义，不如mustn’t贴合校规。
8. 答案：B
解析：there be句型否定，后面名词rules是复数，所以用aren’t；
there be和have不能混用，排除C、D。
9. 答案：B
解析：Must I…? 的否定回答固定用 No, you needn’t.（不必）；
第二空 have to 表示客观要求，明天早上之前必须完成作业。
10. 答案：A
解析：Let是动词，后面接宾格us；固定搭配 let sb. (not) do sth. ，用动词原形be。
11. 答案：B
解析：物主代词辨析：
- theirs：名词性物主代词，单独使用，= their skateboards
- their是形容词性物主代词，后面必须加名词，此处无名词，排除。
12. 答案：C
解析：now为现在进行时标志，have to有人称和时态变化，现在进行时形式为 is having to ，表示此刻不得不做某事。
13. 答案：C
解析： or 在这里意为“否则”，句意：不要大声说话，否则会打扰别人学习。
14. 答案：B
解析：两处都是动名词作宾语/主语：
like doing sth. （长期爱好）；第二个skateboarding在句子中作主语，必须用动名词形式。
15. 答案：B
解析：固定句型 What do you think of…? = How do you like…? 你认为……怎么样？
核心语法汇总
1. must / have to / mustn’t / needn’t 情态动词辨析（七下重难点）
2. there be 就近原则
3. 形容词性物主代词 vs 名词性物主代词
4. 现在进行时标志词运用
5. 祈使句、let句型用法
6. 动名词作主语、宾语
7. 疑问词辨析（how系列）
