We have two rooms but I can’t decide .
The boy did his homework with the help of his father in the past. But now he can do it alone.
——How far is Yuhua Middle School from here?——It’s around five minutes’walk.
---Miss Lee, I didn’t catch what you said. Could you tell me ______ again?---OK.
Do you want to be healthy? ______. Smiling can help you stay healthy.
---George, how can you prove the earth is round?---I can’t, sir. ______, I never said it was.