My father likes watching me _____ in the river. [ ]

I have more paper clips than_______, but my CDs are fewer than________.

May I smoke here，please?—I am afraid you ．This is a non-smoking area．

Peter, a superstar in environment protection, reduces plastic and other _______ through DIY.

The task is challenging and demanding. Who do you think can make it, Tom?–_______ my partner have a try? I think she is the right person to do it.