Currently about 70,000 people are aged 100 or above in America. （）

It is virtually impossible to persuade him to apply f...

单项选择题It is virtually impossible to persuade him to apply for the job.

The weather is a constant subject of conversation in ...

单项选择题The weather is a constant subject of conversation in Britain.

I have been trying to quit smoking. A．give up　B．pick up...

单项选择题I have been trying to quit smoking.