A．work atB．work onC．work outD．work overIt took me a who……

单项选择题Tom is still full of beans at 70.

单项选择题I didn't help him. I would have,however,I didn't have the money.

单项选择题The economic reform in Japan has been accelerated.

单项选择题It's impolite to cut in when two persons are holding a conversation.

单项选择题I wonder who first conceived the idea of cutting a hole in the door.