I used to smoke _____ but I gave it up 3 years ago.

To save energy, people have to （ ） their electricity consumption.

Plastics is a kind of （ ） which is widely used in industry.

The factory, including its machines and buildings, （ ） burnt last night.

The two companies decided to （ ） on a project concerning animal cloning.

Herman’s success is （ ） his hard work and his academic ability.

Realizing that he hadn’t enough money and _____ to borrow from his father, he decided to sell his watch.

Tolerance （ ） respecting the opinions of others.

If you don’t agree with me, （ ）.

I think it’s high time we _____ strict measures to stop pollution.

_____ the members cooperate well, the team will keep winning games.

After （ ） seemed ages, the newsman disclosed the facts.