(
B
)7.—Is this a picture your mother? —Yes,she's beautiful.
A.in
B.of
C.at
答案：B 7. of 表示所属关系，a picture of your mother 意为“一张你妈妈的照片”，故选 B。
(
A
)8.实验班原创 思维品质 Photosynthesis(光合作用)means plants use light to convert(转化) and into food and release(释放) .
$A. CO_2; H_2O; O_2 B. O_2; H_2O; CO_2 C. CO_2; O_2; H_2O$
答案：A 8. 光合作用，通常是指绿色植物吸收光能，把二氧化碳(${CO_2}$)和水(${H_2O}$)合成有机物，同时释放氧气(${O_2}$)的过程。
A: Where do you
live
?
B: I live in a
city
.
A: Is your city clean now?
B: Yes,it is. But it wasn't clean in the past.
A: What
made
the air dirty?
B:
Smoke
made the air dirty.
A: What can we do to
make/keep
the city clean?
B: We can't
drive
too much. We can also
plant
more trees. Do you like trees?
A: Of course,I
do
. They're very useful.
答案：1. live 2. city 3. made 4. Smoke 5. make/keep 6. drive 7. plant 8. do
六、阅读所给材料,完成下面的表格。
Lisa: I think our city is clean. Most people put
rubbish
in the bin. They don't litter anywhere. Cleaners sweep the streets and keep them clean. But I think there is one problem. Some people walk their
dogs
in the streets. The dogs may take a pee and a poo anywhere. It makes the streets dirty. Cleaners have to
work
hard to keep the streets clean.
Mandy: I think our city is clean. The streets are clean and the
air
is good. But some places are a little messy. People don't put bikes or e-bikes in order. Sometimes they even put bikes and e-bikes in the middle of the pavements. It makes me angry. The good thing is that it's getting
better
. Most streets are clean and tidy.
答案：1. rubbish 2. work 3. dogs 4. air 5. better
