--Haven't you seen Mr. Wilson at the lecture?
--Yes, but he had left _________ I could ask him any questions.

---Miss Li, where did you visit last week?
--- I visited a big company __________ ships are made.

-Do you know the boy________ is sitting next to Peter?
-Yes. He is Peter's friend. They are celebrating his ________ birthday.

Friends are angels who lift us to our feet _______________ our wings have trouble remembering how to fly.

Some of us fail to learn that pain is the body’s way of informing the mind ______ we are doing something wrong, not necessarily ______ something is wrong.

When we get knocked down, we get back up and we come back stronger, and, ____ I’m President, that’s what we’ll keep doing.

______ he referred to in his article was often discussed by many people.

Our coach says we won’t keep winning games ______ we keep playing well.

_____ I do feel pity, I can’t really do very much to help them out of the difficulty.

My point is that you must do ____________ is best for you.