--- Why is your sister upset?
--- Because she ________ the final exam.
--- What are you ________?
--- My dog. I can't ________ it.
--I'm sorry for ______ I said.
--It doesn't matter.
--I think he will do ______ next time.
--I think so.
--I'm sorry I broke your pen. Let me buy you a new one.
--______ I have another one.
-What's the matter ________ Mr.Liu?He is wet through.
-His car run ________ the river.
-What ________ the weather ________ today?
-It's very cold.
A:It is hot here.
B:Please ________ the door open.