A. Trom
3. Unless we
A. predict
-. Today the beach is very dirty and full of garbage;
A. so
B. because
C. therefore
. People have worked hard to improve their living standard,
A. do they
B. haven't they
C. don't they
D. have they
A
D. conservationist
A. plumber
who works to protect the environment from damage or destruction.
C. consumer
B. electrician
Jean cloth is very strong and hardly
A. tears at
B. puts on
our water resources, there will be a shortage of clean water someday.
C. replace
D. conserve
B. use
we all must clean it up
D. if
C. takes off
D. wears out
a show to raise money for the poor children.