— do you spell “black” ? — B-L-A-C-K
I wonder ______ you said to him before he came.
About two years ________ since the earthquake took place in Wenchuan.
--Must I finish my homework now, Mum? ----No, you_____.
--- Can you tell me ______ it is from here to the Summer Palace? ---Let me see. It's about 15 minutes' ride.
---Don't skate on the lake! ---Why not? Isn't it thick enough___________?