我爷爷在他七十多岁的时候开始对摄影感兴趣.
My grandpa became in photography .
By the time I got to the cinema,the movie (begin).
She shouldn't (allow) to go out alone.
Mr.Green hates (travel) by air.He always falls asleep during the flight.
There are many ( different) between them.
T him!He has no difficulty in working out the problem.