Many cities issued a warning of air pollution for PM-2.5 readings, which became Concern of all the people
—You see, I’m poor in physics and you are not good at chemistry, and…… — That’s _______ we should help each other.A. when B where C. how D. what
You'd better change another book, because ______ page of the book is torn, and ______ cover looks very old.
Although Jack has made good preparations for the match, he is still about his chance of winning.
It’s quite natural that kids like to play with friends _______ their own age.
—I’m sorry. I shouldn’t have been rude to you. —You _______ your temper but that’s all right.