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数词+hundred/thousand/million/billion+名词复数 hundreds/thousands/millions/billions of+名词复数 例 1. __people go swimming in summer in Dalian. A、Thousands B、Thousand of C、Thousands of D、Thousand 2. __the students will take part in this English speech contest. A. Two hundred of B. Two hundreds of C. Hundreds of D. Hundred of | 
