Pollution(污染) is a very serious problem today. Rubbish makes the rivers
dirty
and smelly. The fish are
dead
. There are many factories
around
us. They make a lot of goods, but they make a lot of
smoke
and dirty water too. We
should
do something to
help
keep our city
clean
. For example, we shouldn't
throw
rubbish everywhere. We can go to school in a
green
way. I believe our city will be more
beautiful
and cleaner!
答案：dirty, dead, around, smoke, should, help, clean, throw, green, beautiful
(
F
)1. How to stop the desert growing is a small problem.
(
T
)2. The world's biggest desert is the Sahara Desert.
(
F
)3. Planting more trees can make the Sahara Desert grow.
(
F
)4. The writer thinks that only one thing makes the soil weak.
(
F
)5. The Sahara Desert is in China.
答案：1.F 2.T 3.F 4.F 5.F
( )1. According to the article, without enough rain, ______.
C
( )2. The underlined word "source" means "______" in Chinese.
B
( )3. What is "cloud seeding"?
C
( )4. What happens first when people make rain?
B
( )5. Which of the following sentences is TRUE according to the article?
B
答案：1.C 2.B 3.C 4.B 5.B
