ChaseDream

标题: old prep 里一道语法题 [打印本页]

作者: hellrose 时间: 2014-3-27 20:34
标题: old prep 里一道语法题

Organized in 1966 by the Fish andWildlife Service, the Breeding Bird Survey uses annual

roadside counts along established routesfor monitoring of population changes of as many as,

or of more than 250 bird species,including 180 songbirds.

(A) for monitoring of population changesof as many as, or of

(B) to monitor population changes of asmany, or

(D) that monitors population changes of

(E) that monitors changes in populationsof as many as, or

为什么B 选项不是 as many as,or 而只是as many,or？

感谢大家~祝大家750+！

欢迎光临 ChaseDream (https://forum.chasedream.com/)