2. 考研
  3. (While) schools developing online curricula try to strike (a balance) between profits and prestige, many educators (are confusin

(While) schools developing online curricula try to strike (a balance) between profits and prestige, many educators (are confusin

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问题 (While) schools developing online curricula try to strike (a balance) between profits and prestige, many educators (are confusing) about their role in this (digital world).
选项 A、While
B、a balance
C、are confusing
D、digital world
答案C
解析 应为被动式，将confusing改成are confused。人做主语时，表语常用—ed的形式；物做主语时，表语常用-ing的形式。
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