I bought a sweater for only 50 yuan yesterday; it was a real .A. tradeB. exchangeC. bargai

问题补充：

I bought a sweater for only 50 yuan yesterday; it was a real .

A. trade

B. exchange

C. bargain

D. business

答案：

A. trade

B. exchange

(答案→)C. bargain

D. business

解析：名词辨析。A贸易；B交换；C便宜货；D生意。结合句意可知C正确。句意：昨天我只花了50元就买了一件毛衣，真是一件便宜货啊！