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【题目】The audience who come to the live broadcast scene are always chosen ______ in order to be fair.

A. in general B. by chance

C. on purpose D. at random

【答案】D

【解考查介词短语。句意为了体现公平,来直播现场的观众总是随机选择的。at random任意地,随便地in general通常大体上一般而言,总的来说by chance偶然地,意外地无意之中碰巧on purpose并非偶然地故意地

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