Exercise 1
Cats make wonderful house pets. They are very loving and friendly. They don’t eat much, so they are not expensive. Cats are also clean and look beautiful. They’re fun to have in your home.
Exercise 2
Some people think tsunamis are the worst type of natural disaster that can hit a region. (Topic sentence)
1. The huge wave of water does damage twice, when first coming in, and then going out again.
2. The massive weight of water can sweep away protective barriers as well as buildings.
Exercise 3
a. One of the best ways to start is to raise money through a school fundraiser.
2. Every good friend you have should show some important qualities. Strong loyalty is one of the best traits of a friend, because that means he or she will always stand up for you. ... [missing supporting sentence] … And most of all, a friend is willing to forgive you if you make a mistake and are sorry about it. When you both show these important attitudes to each other, you will be friends for many years.
b. Honesty is another good quality. It creates trust and confidence between friends.
3. Computers and tablets are being used more and more for studying in school for several reasons. One reason is that students will grow up in a world where they will be using computers for most jobs. So they need to learn to use computers as early as they can. ... [missing supporting sentence] … And some companies are even making textbooks into files that can be used on tablets. Computers are now being used all through society, so it’s not surprising that their use in schools is also growing.
c. Computer games are also used to help students learn thinking and reasoning skills.