--Mum, it's late. Why are you still here?--Dad hasn't come back yet. I for him.A. am waiting B. was waiting C. waited
Old Henry lives ________but he doesn’t feel________.
That’s a tall building, and there are ________ rooms on ________ floor.
If you don’t understand the word, you can ________ in a dictionary.
–Did Tom know ________? --I’m not sure.
He was ________ weak ________ he couldn’t go on working.