Children______.
A.are seldom punished for doing wrong
B.can find something new and interesting all the time
C.always want to be young
D.live a perfectly happy life if they always behave well
This passage mainly tells reader how ______.
A.the London Underground works
B.the London Underground develops
C.a passenger buys subway ticket
D.a passenger travels on a subway train
Last week Tom Walker arrived in London where his company has a new office.(英译汉)