问答题

Why is there no natural reason for famine?
A、We now have technology to preserve and keep food.
B、We can transport food over long distances.
C、The government can import food and distribute it to its people.
D、Nature can never create any disasters for human beings.

A.
B、We
B.
C、The
C.
D、Nature

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“The biggest threat to our environment today is the way we, as human beings, see out environment” does not imply that ().
A、everything in the ecosystem is part of one complete whole
B、most people hold a wrong view on the environment
C、everything affects and is affected by its environment
D、people are not conscious of the importance of trees

A.
A、everything

单项选择题

___________, a car knocked him down.
A. While crossing the street
C. While the boy was crossing thestreet
B. While crossed the street
D. While crosses the street