Question

Prices of daily goods _______ through a computer can be lower than store prices.

1. A.
   are bought
2. B.
   bought
3. C.
   been bought
4. D.
   buying

Answer 1

B
解析：
考查非谓语动词用法。bought through a computer是一个过去分词短语，在这里作为定语修饰daily goods. Goods与buy构成被动关系，所以用过去分词的形式。bought through a computer="which" is bought through a computer.句意：通过电脑购买的日常用品的价格可能比商店里的价格要低。