【B6】
A. by
B. in
C. to
D. with
A．Urban residents produce more and more waste water.B．Seas and rivers provide less and
A. Urban residents produce more and more waste water.
B. Seas and rivers provide less and less drinking water.
C. Industries need large quantifies of water.
D. Agriculture produces large amount of harmful chemicals.
Statistics show that ______.
A. one who has been hospitalized is likely to commit suicide
B. depressive illness is most obvious in men
C. more men than women commit suicide
D. children who are loved are never depressed
The author may agree that the Selby crash ______.
A. triggered the development of the awake system
B. happened because the train driver drifted off at the wheel
C. highlighted the advantages of installing the awake system
D. caused researchers' concern about the practicality of the awake system
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