There is only, ______, random monitoring of gas emission by the pollution contro

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问题 There is only, ______, random monitoring of gas emission by the pollution control agency.

选项 A、at best
B、with the best
C、for better
D、on the better

答案 A

解析词组辨析题。at best意为“至多，充其量”，符合句意，故本题答案为A。with the best表示“不比任何人差”，排除；for better后常接or for worse表示“同甘共苦”，排除；没有on the better这个词组。

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