37, You didn’t remember to turn off the TV last night, did you?
38, Pollution is the most serious problem, isn’t it?
39, A new school for poor children will be built by them next month.
40, The new president will be interviewed on TV by some people.
41, The driver pulls the handle to go back or pushes it to go forward.
42, There have been many interesting transport inventions nowadays.
43, I guess it is a convenient, green way to travel.
44, The drivers sit inside the wheel and pedals to go forward.
45, The Mono-wheel is a single-wheel bike.