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18. there are more birds,but not more numbers. t251
the gyrfalcon, an arctic bird of prey, has survived a close brush with extinction; its numbers are now five times greater than when the use of ddt was sharply restricted in the early 1970’s. .
(a) extinction; its numbers are now five times greater than
(b) extinction; its numbers are now five times more than
(c) extinction, their numbers now fivefold what they were
(d) extinction, now with fivefold the numbers they had
(e) extinction, now with numbers five times greater than
19. pay for jobs, t109
20. 表示原因,sth is determined by sth.
21. elect to do sth. t55
22. lead sb. to do sth.
23. attribute to sb. 归功于t21
24. likelihood of sth. or likelihood that
do you think there is any likelihood of his agreeing to it?
25. regard as sth. ,regard as doing sth or sth. is regarded as sth.;prize sth as sth. t97;view sth as sth. t47;think of x as y t182;use sth. as sth.
26. model… after…
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