In his lecture, the professor referred to the belief, in contrast to all other countries, ______the elderly are wise, ______is particularly dominant in the Chinese culture．

I do my homework _____ ten o’clock every night. [ ]

He came __________ a good idea to help the old peopl.[ ]

This box is too heavy.—Well, we have got some ________ ones. They’re over there, on the desk.

英语数字6,500,431,729读成____________.