6. Choose the best answer (A, B, C or D). 1.She came to the stadium (in, on, by) bus. 2.They go to work (in, on, by) train. 3.I usually read books while I am (in, on, by) a train. 4.We went to Gothenburg last summer and it was our first time (in, on, by) a tram. 5.He often travels (in, on, by) his car. 6.They prefer not to go (in, on, by) car because it’s more expensive. 7.My children often sleep while they are (in, on, by) a plane. 8.The computer belongs to Nhung. That computer is hers/her/she. 9.Their car is red. We/Our/Ours car is grey. 10.The books are all me/mine/my. 11.What happened to him? He has broken him/his/he arm. 12.Mine/My/Me keys are here on the table. Where are your/yours/us? 13.Is this chair you/your/yours? 14.This time next year my father will work/will be working in the hydro power station. 15.Don’t forget to turn off the lights before you’re leaving/you leave. 16.My brother and I will cycle/will have cycled to school to cut air pollution. 17.By the year 2020, people in my village will use/will be using energy from the sun. 18.What will we do/will we be doing to save electricity? 19.What will happen/will be happened to us when the non-renewable energy sources run out? 20.Wind power is a renewable source because it can be replaced/can replace easily and quickly