_____ they are very tired, they feel happy because they’ve finally finished their project.

The pot-bellied pig is too big to sleep in the house, _________I have to make her a big one.
A. or B. so C. but

We didn't go home ______ the old man was sent to the hospital.
A. until          B. when        C. while

The rain is very heavy________ we have to stay at home.
A. but      B. because    C. so

—Will you play basketball against Class 3 tomorrow?
—Yes. ________ it snows.

Animals are part of nature          should be well protected.
A. and                   B. or                   C. but

—Why do you like staying in Guiyang?
—Because the weather there is _____ too hot _____ too cold.

There are many tall green trees on       side of the street.
A. either,         B. both        Call             D. every

______Zhai Xiaowei has only one leg, he can dance wonderfully
A .Though B.But C. So

It’s too late to invite any more people. ______, you know how Tim hates parties.