6 Complete the sentences with the words below. There is one extra word concern decisions express get grades have provide research take part in 1 The fact that children watch too much television causes ______ for many parents. 2 Some people like to ______ online games so that they can play with their friends. 3 Using a mobile phone can ______ positive and negative effects on people's lives. 4 Some ______ are difficult to make 5 Scientists are doing ______ into how important it is for students to do homework. 6 Students who work hard usually get good ______ 7 My dad always encourages me to ______ my opinions about what is happening in the world. 8 Eating fruit and vegetables can ______ a lot of health benefits.