【问】 You can’t judge a person by his look.(人不可貌相，不能按外貌来判断一个人。)有人告诉我句中的by his look的用法有毛病，但我经常看到by the look的用法。
 【答】 名词look作“看”、“表情”解时，是个可数名词，有单复数形式：
 1. She gave me a strange look. (LDCE)
 她奇怪地看了我一眼。
 2. I knew she didn’t like it by the look on her face. (LDCE)
 看她的面部表情我知道她不喜欢这件东西。
 3. There were angry looks from the neighbours.
 邻居们显出生气的样子。
 当表示“外貌”、“容貌”或“美貌”时，则应当用复数形式looks：
 1. His looks are really quite remarkable. (Wilde)
 他的外貌确实很漂亮。
 2. The twins were almost identical in looks.
 这对双胞胎长得几乎完全一样。
 3. She’s beginning to lose her looks.
 她在渐渐失去她的美貌。
 4. I didn’t marry him for his looks. (EED)
 我并不是因他的美貌才嫁给他的。
 5. She kept her looks even in old age. (LDCE)
 她虽然老了，但美貌依旧。
 因此，你的引文应改为：You can’t judge a person by his looks.
 请做下面的英语试题：
 1. I could tell he was surprised from the____.
 A. appearance B. shock C. look D.sight(攻读硕士学位研究生入学考试英语试题，86A)
 2. She had lost her____.
 A. look B. looks C. looking D. looked