第27题: [单项选择]What did the speaker probably talk about previously A. It allowed workers to spend more time at home. B. It gave workers opportunity for better training. C. It let workers live far from their jobs. 参考答案:C
第28题: [单项选择]铆接连接的基本形式有()。 A. 3种 B. 4种 C. 5种 D. 6种 参考答案:B