单项选择题
(), wild dogs have very keen(灵敏的)senses of sight, hearing, and smell.
A. Like the cats B. Cats are like C. Although the cats like D. They are like the cats
单项选择题 It is essential that people () enough vitamins every day.
单项选择题 I knew I could not finish my homework()
单项选择题 Not only Tom but also his wife () fond of watching television.
