in thought, he sat at the edge of the bed, with his eyes           on the letter in his hand.

_____ Ming Ming with his sister, I find Ming Ming prefers classical music to pop music.

_____ extremely exhausted, I turned to look at the puppy that _____ at the door.

Mr. Smith suggested the student ___ to be given a prize.

Knowing office rules—whether _____ or not—is critical, especially for young job seekers.