时间:2010-09-11 12:57:52
Sharks are important for the world''s 64 . They eat injured and diseased fish. Their hunting activities mean that the numbers of other fish in ocean waters do not become too 65 This protects the plants and other forms of life that exist in the oceans.
参考答案: A 答案解析: attack
1
A.attack
B.meet
C.love
D.visit
参考答案: B 答案解析: eatable
2
A.terrible
B.eatable
C.valuable
D.possible
参考答案: C 答案解析: friends
3
A.source
B.existence
C.friends
D.fish
参考答案: D 答案解析: Earth
4
A.Space
B.Sky
C.Land
D.Earth
参考答案: C 答案解析: because of
5
A.because
B.since
C.because of
D.by reason that
参考答案: D 答案解析: where
6
A.whose
B.which
C.that
D.where
参考答案: B 答案解析: for
7
A.to
B.for
C.like
D.with
参考答案: A 答案解析: times
8
A.times
B.places
C.seas
D.oceans
参考答案: C 答案解析: chemicals
9
A.sciences
B.mathematics
C.chemicals
D.physics
参考答案: B 答案解析: senses
10
A.feelings
B.senses
C.touches
D.tastes
参考答案: D 答案解析: other
11
A.those
B.these
C.another
D.other
参考答案: A 答案解析: systems
12
A.systems
B.processes
C.ideas
D.circles
参考答案: A 答案解析: recover
13
A.recover
B.reform
C.return
D.rely
参考答案: B 答案解析: oceans
14
A.rivers
B.oceans
C.forests
D.mountains
参考答案: D 答案解析: great
15
A.weak
B.little
C.few
D.great