单项选择题
A．It is seriously polluted. B．There are few cars and factories. C．The air is very clear. D．It remains what it was ten years ago.
A．Because he has no work experience. B．Because it’s the easiest way to get the job. C．Because he doesn’t meet the job requirement. D．Because every newcomer starts with a trainee salary.
A．It was boring. B．It was interesting. C．It was quite long. D．It was easy to understand.