A．Train travel can help him know about people.
B．Train travel is an uncomfortable experience for him.
C．Train travel is better than plane travel because it saves money.
D．He doesn't care much about travel vehicles.
A．Most advertisements on TV are cheating consumers.
B．Watching TV costs us much money.
C．People spend too much time watching useless things.
D．Watching TV consumes too much energy.
A．It provides too many entertainment programs.
B．It is as educational as reading books.
C． It makes us sit in front of it passively.
D．It can broaden one's mind without much cost.