1. We can put rubbish in the
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
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
(
B
) 1.We can take the metro ______ school.
A.in
B.to
C.for
答案：B
(
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
(
C
) 3.They help ______ the air clean.
A.keeping
B.keeps
C.keep
答案：C
(
B
) 4.We plant trees ______ our city clean.
A.keep
B.to keep
C.keeps
答案：B
(
A
) 5.— What ______ the cinema dirty?
— ______ makes it dirty.
A.makes；Rubbish
B.makes；Signs
C.keeps；Rubbish
答案：A
(
C
) 6.The rubbish ______ our city dirty.
A.make
B.making
C.makes
答案：C
(
B
) 7.Look at ______ picture of our city.
A.these
B.this
C.those
答案：B
(
A
) 8.The floor is wet. Helen ______ and ______.
A.slips；falls
B.falls；slips
C.picks；falls
答案：A
