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

He talks as if he _____ everything in the world.

They didn’t come to the party， though they （ ） that they would.

He was （ ） enough to see that Jake was the best candidate for the job.

William suggested _____ a party for Elizabeth who was going to retire soon.

He （ ） me to give up the holidays in Spain next month.

At the 60th anniversary, the guests sitting in the front are those ______ graduates from the university.

The first question we will discuss is _____ we should go there so early tomorrow.

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

（ ） some mammals came to live in the sea is now known.

All the traveling _____ are to be paid by the company if you travel on business.

We could see the stars （ ） well from the top of the mountain.