雅思
填空题阅读部分第17题：By the mid-1960s，cotton farmers in Central America found that pesticides
A were wiping out 50% of the pests plaguing the crops．
B were destroyin9 50% of the crops they were meant to protect．
C were causing a 50% increase in the number of new pests reported．
D were costin9 50% of the total amount they spent on their crops．
A were wiping out 50% of the pests plaguing the crops．
B were destroyin9 50% of the crops they were meant to protect．
C were causing a 50% increase in the number of new pests reported．
D were costin9 50% of the total amount they spent on their crops．
参考答案：暂无进入在线模考
D
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