Nature reserves are very important for preserving many animals and plants, which would _______ run the risk of becoming extinct.

I'll be home late, but please don't stay ____ for me.

You should know _______to spend all your money on those impractical fancy goods.

The new machine, as is reported in the local newspaper, will work twice as fast, _____ greatly reducing costs.

Compared with male graduates, a(n) ______ small number of female graduates can get employed when they go job-hunting.