______ of the coats ________ made of cotton. They feel comfortable.
--Why do you like going to Kunming for a holiday?---Because the weather there is _____too hot ______ too cold.
When H7N9 bird flu first appeared, people didn't know_______ doctors could cure it.
---Hurry up, _____you will miss the school bus.---I know that, Mum. I’ll be ready in a minute.
Some people prefer yellow when they hope for__________.
The boy looks nice____white and the red sweater looks good _____the girl.