Exercise 1: Circle the mistake in each sentence
1.When Jack is in Italy, he used to stay with an Italian family.
2.Although our grandfather was old however he could help us
3.The most common traffic problems in cites around the world is traffic jams.
4.Thanksgiving is tradition celebrated with a feast among family and friends.
5.Tom Hanks is one of the most famous and richest actors in Hollywood.
6.This time next year my father works in the hydro power station.
7.Don’t forget to turn off the lights before you are leaving.
8.My brother and I will have cycled to school to cut air pollution.
9.By the year 2020, people in my village are using energy from the sun.
10.What will be happened to us when the non-renewable energy sources run out?
11.Wind power is a renewable source because it can replace easily and quickly.
12.The students in my school will be put low energy light bulbs in the school.
13.Alternative sources of energy is developed quickly in the future.
14.The energy consumption will reduce as much as possible.