Bài 1: Điền từ thích hợp vào chỗ trống: People........need to go to hospital very quịckly sometimes go by helicopters. In all parts of the world, helicopters help a lot of people. ( Who, which, what.) One computer was bigger than a small bedroom. Now computer can do a lot more things and.......are some which you can carry in a bag or pick up in one hand. ( There, their, they.) You can find computers in schools,.......work and in the home. ( At, in, on.) Often you want to go on the computer in the evening and you (1).........to wait for your brother, sister, mum or dad to stop working, playing games, or writing to a friend in (2)..........place. (1. Can, must, have. 2. One, another, different.)