Q7:

A recent review of pay scales indicates that CEO’s now earn an average of 419 times more pay than blue-collar workers, compared to a ratio of 42 times in 1980.

A. that CEO’s now earn an average of 419 times more pay than blue-collar workers, compared to a ratio of 42 times

B. that, on average, CEO’s now earn 419 times the pay of blue-collar workers, a ratio that compares to 42 times

C. that, on average, CEO’s now earn 419 times the pay of blue-collar workers, as compared to 42 times their pay, the ratio

D. CEO’s who now earn on average 419 times more pay than blue-collar workers, as compared to 42 times their pay, the ratio

E. CEO’s now earning an average of 419 times the pay of blue-collar workers, compared to the ratio of 42 times

Q24:

By sucking sap from the young twigs of the hemlock tree, tree growth is retarded by the woolly adelgid, causing needles to change color from deep green to grayish green and to drop prematurely.

A. tree growth is retarded by the woolly adelgid, causing needles to change color from deep green to grayish green and to drop

B. tree growth is retarded by the woolly adelgid, and this causes the color of needles to change from deep green to grayish green, and their dropping

C. the woolly adelgid retards tree growth, which causes needles to change color from deep green to grayish green, and dropping

D. the woolly adelgid retards tree growth, causing needles to change color from deep green to grayish green and to drop

E. the woolly adelgid retards tree growth, and this causes the color of needles to change from deep green to grayish green, and the their dropping

and what is adelgid?

7--B

24--D adelgid是主语，一种害虫

同意，第7题选B, on average的说法比较地道，than 也不和compare连用。

第24题选D，By sucking up 就决定了句子的主语不是tree growth