1. We can put rubbish in the
2. Rubbish made the street
3. Smoke from the
4. We can do many things to
bin
. 2. Rubbish made the street
dirty
. 3. Smoke from the
factories
made the city
dirty. 4. We can do many things to
keep
our city clean
.答案：1. bin 2. dirty 3. factories, city 4. keep, clean
三、用所给单词的适当形式填空。
1. People from
2. The flowers
3. You can't
4. Someone is
5. Dirty water
6. We can plant more trees
1. People from
cities/city
(city) like to go to farms for their holidays. 2. The flowers
make
(make) the room beautiful. 3. You can't
litter
(littering) here. 4. Someone is
smoking
(smoke). I can smell it. 5. Dirty water
makes
(make) some fish dead. 6. We can plant more trees
to keep
(keep) our city clean.答案：1. cities/city 2. make 3. litter 4. smoking 5. makes 6. to keep
(
A.in
B.to
C.for
B
) 1.We can take the metro ______ school.A.in
B.to
C.for
答案：B
(
A.are；aren't
B.is；isn't
C.is；aren't
C
) 2.There ______ a lot of rubbish, so there ______ any fish in the river.A.are；aren't
B.is；isn't
C.is；aren't
答案：C
(
A.keeping
B.keeps
C.keep
C
) 3.They help ______ the air clean.A.keeping
B.keeps
C.keep
答案：C
(
A.keep
B.to keep
C.keeps
B
) 4.We plant trees ______ our city clean.A.keep
B.to keep
C.keeps
答案：B
(
— ______ makes it dirty.
A.makes；Rubbish
B.makes；Signs
C.keeps；Rubbish
A
) 5.— What ______ the cinema dirty? — ______ makes it dirty.
A.makes；Rubbish
B.makes；Signs
C.keeps；Rubbish
答案：A
(
A.make
B.making
C.makes
C
) 6.The rubbish ______ our city dirty.A.make
B.making
C.makes
答案：C
(
A.these
B.this
C.those
B
) 7.Look at ______ picture of our city.A.these
B.this
C.those
答案：B
(
A.slips；falls
B.falls；slips
C.picks；falls
A
) 8.The floor is wet. Helen ______ and ______.A.slips；falls
B.falls；slips
C.picks；falls
答案：A