Question

Cars do cause us some health problems—in fact far more serious ________ than mobile phones do.

A．one

B．ones

C．it

D．those

Answer 1

B

代词用法考查题ones代指可数名词复数在本题中为避免重复指代problems。 汽车确实给我们带来严重健康问题，实际上超过了手机带来的问题。