单项选择题
A. Never mind B. No matter C. That's good D. Not care
It is essential that people () enough vitamins every da...
单项选择题It is essential that people () enough vitamins every day.
A. have B. had C. must have D. will have
(), wild dogs have very keen(灵敏的)senses of sight, heari...
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
I knew I could not finish my homework()A. by he had com...
单项选择题I knew I could not finish my homework()
A. by he had come B. until he came C. when he comes D. before he comes
