–Why, Jack, you look so tired! --Well, I ___the house and I must finish the work tomorrow.
The doctor must have sat up all night with his patient, __ you see, he looks tired and sleepy.
It’s quite warm __December in China.
The mountains look grey ___ the blue sky.
Xiao Li didn’t come to our party. We all fell sorry __ him.
Taiwan is an island that lies ___ the southeast coast of China.