听材料,回答小题。
(1)
What happened to the Cuyahoga River in 1969?
A . It was cleaned up.
B . It was seriously polluted.
C . It became the most outstanding river.
(2)
How long did it take for the river to become clean?
A . A few months.
B . Several years.
C . A few days.
(3)
What can make the river clean according to the speaker?
A . Hard work.
B . Something imaginable.
C . The control of using your credit card.
(4)
What shall we do when facing an impossible situation?
A . Wait for something to change.
B . Imagine something outstanding.
C . Just be patient and do something.
答案: B
B
A
C