--_____foggy day !--Something must be done to solve the haze problem .A.How B. What C. What a
He’s been in China for two years. And he’s used to _______ in China.
_______ his help, we finished the work on time.
-_____ have you worked? -Since 2 pm.
We can’t work out the physics problem. Can you tell us ________?
We’ll go shopping if it ________ rain tomorrow.