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3. The children are _______ (步行回家) after school.
答案：
walking home
解析：“步行回家”译为“walking home”，“are”后接现在分词表进行时。
解析：“步行回家”译为“walking home”，“are”后接现在分词表进行时。
4. When we see some toys on the floor，we should _______ (捡起它们).
答案：
pick them up
解析：“捡起它们”译为“pick them up”，代词“them”放中间。
解析：“捡起它们”译为“pick them up”，代词“them”放中间。
5. Look，there is some _______ (脏水) on the floor.
答案：
dirty water
解析：“脏水”译为“dirty water”，不可数名词。
解析：“脏水”译为“dirty water”，不可数名词。
二、精挑细选。(选择填空)
（ ）1. Smoke from cars _______ the air dirty.
A. makes
B. make
C. making
（ ）1. Smoke from cars _______ the air dirty.
A. makes
B. make
C. making
答案：
A
解析：主语“Smoke”是不可数名词，动词用第三人称单数“makes”，选A。
解析：主语“Smoke”是不可数名词，动词用第三人称单数“makes”，选A。
（ ）2. I like _______ things. Now I'd like _______ a model ship.
A. make；making
B. making；make
C. making；to make
A. make；making
B. making；make
C. making；to make
答案：
C
解析：“like doing sth”（喜欢做某事），“would like to do sth”（想要做某事），选C。
解析：“like doing sth”（喜欢做某事），“would like to do sth”（想要做某事），选C。
（ ）3. The twins _______ in Dalian last year. They _______ here now.
A. are；were
B. were；are
C. was；are
A. are；were
B. were；are
C. was；are
答案：
B
解析：“last year”（去年）用过去时，“the twins”是复数，用“were”；“now”（现在）用现在时，用“are”，选B。
解析：“last year”（去年）用过去时，“the twins”是复数，用“were”；“now”（现在）用现在时，用“are”，选B。
（ ）4. They usually go to the English Club _______ Thursday. It starts _______ nine _______ the morning.
A. at；on；in
B. in；in；at
C. on；at；in
A. at；on；in
B. in；in；at
C. on；at；in
答案：
C
解析：“Thursday”（周四）前用“on”；“nine”（九点）前用“at”；“the morning”前用“in”，选C。
解析：“Thursday”（周四）前用“on”；“nine”（九点）前用“at”；“the morning”前用“in”，选C。
（ ）5. —Who was on duty last Friday? —_______.
A. I am
B. I was
C. Yes, I was
A. I am
B. I was
C. Yes, I was
答案：
B
解析：问句用过去时，答句也用过去时，“I was”符合，选B。
解析：问句用过去时，答句也用过去时，“I was”符合，选B。
（ ）6. What a fine day! How about _______ out for a walk?
A. go
B. to go
C. going
A. go
B. to go
C. going
答案：
C
解析：“How about doing sth”（做某事怎么样），用动名词“going”，选C。
解析：“How about doing sth”（做某事怎么样），用动名词“going”，选C。
（ ）7. He should _______ clothes every day.
A. wash
B. washing
C. washes
A. wash
B. washing
C. washes
答案：
A
解析：“should”后接动词原形“wash”，选A。
解析：“should”后接动词原形“wash”，选A。
（ ）8. —Is your classroom _______? —No，_______.
A. cleaned；it doesn't
B. clean；it isn't
C. cleans；it isn't
A. cleaned；it doesn't
B. clean；it isn't
C. cleans；it isn't
答案：
B
解析：第一空用形容词“clean”（干净的）作表语；否定回答用“it isn't”，选B。
解析：第一空用形容词“clean”（干净的）作表语；否定回答用“it isn't”，选B。
三、查漏补缺.(看图填词,完成句子。每空一词)
1. This is a _______. The _______ make the shelf(书架) messy. The t_______ make the floor messy.
1. This is a _______. The _______ make the shelf(书架) messy. The t_______ make the floor messy.
答案：
由于缺少图片具体信息，无法解答。
2. Rubbish makes the cinema _______ and _______. To keep the cinema _______，we can't _______ or _______ in the cinema.
答案：
由于缺少图片具体信息，无法解答。
3. —What did you do last weekend?
—I _______ _______ and caught a big fish.
—I _______ _______ and caught a big fish.
答案：
went fishing
解析：根据“caught a big fish”（钓到一条大鱼）可知是去钓鱼，“last weekend”用过去时，“went fishing”（去钓鱼）符合。
解析：根据“caught a big fish”（钓到一条大鱼）可知是去钓鱼，“last weekend”用过去时，“went fishing”（去钓鱼）符合。
4. —What can we do to keep the city clean?
—We can _______ some factories _______ _______ our city.
—We can _______ some factories _______ _______ our city.
答案：
move；away from
解析：“move some factories away from our city”（把一些工厂搬离我们的城市）符合“keep the city clean”的语境。
解析：“move some factories away from our city”（把一些工厂搬离我们的城市）符合“keep the city clean”的语境。
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