A．chanceB．purposeC．opportunityD．basis
A. chance
B. purpose
C. opportunity
D. basis
查看答案
Researchers think that it is______.
A. safe to eat fresh fish
B. dangerous to get close to the algae
C. safe to be near the algae
D. dangerous to expose the algae
When did pensions reach the height of their popularity？
A. In the late 1970s.
B. In the early 1970s.
C. During World War Ⅱ.
D. In the late 1960s.
听力原文：I want to go to the airport.
(7)
A. To the airport.
B. To the bus stop.
C. To the hotel.
Which of the following statements is true？
A. Scientists have solved the mystery about the fish killer.
B. More studies need to be made about the fish killer.
C. It is proved that the algae are reducing fish populations.
D. Humans have already been affected by the toxin.
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