( ) 6. —The classroom ______ messy and dirty.
—Let's clean the classroom now.
A. makes
B. is
C. are

B

（ ）7. _______ you _______ trees yesterday?
A. Do; planted
B. Did; plant
C. Did; planted

B

( ) 8. There are a lot of ______ in the river.
A. fish
B. rubbish
C. water

A

四、改错。找出句中的错误，并加以改正。
（ ）1. We can cleaning the desks.
A B C
_______
（ ）2. What make our classroom beautiful?
A B C
_______
（ ）3. The fish in the water is all dead.
A B C
_______
（ ）4. There aren't some factories on the farm.
A B C
_______
（ ）5. There's some fish in the river.
A B C
_______

B
; clean
; B
; makes
; C
; are
; B
; any
; A
; There're

五、根据上下文联系,完成对话。
1. A: Look at the river. The water is ______.
B: Yes. The fish ______ dead.
A: What ______ the water dirty?
B: The rubbish.
A: What can we ______?
B: We can ______ the rubbish in the bin.
2. A: The air is dirty. What ______ it dirty?
B: Smoke.
A: ______ is the smoke from?
B: The smoke is from the factories.
C: There's some smoke ______ cars.
A: ______ can we do?
B: We can plant more ______.

dirty
; are
; makes
; do
; put
; makes
; Where
; from
; What
; trees