How about the food I ordered I__________ for 20 minutes.— Sorry, sir. I will be back with yourorder in a minute.

,English , math or Chinese

As we all know, parents are concerned _____ their children’s study, because it is concerned ____ their future .

With some technical problems to be solved, it may be a whilethe system is put into use

.– You are not afraid of snakes, are you?— No, certainly notNot rats, not flies, and ____ ants