During his stay in the USA, Yao Ming returned to China______he was needed.
_____ energy, shut off the hot water after you take a shower.
—Haven’t I told you that you should be home earlier?—Yes, but I _____home earlier than I usually do.
Students who read a lot can do much better in learning English than_____who don’t .
—I’m worried about my English.—_____ harder, _____you will catch up with your classmates.
—Would you mind my sitting here?—______! The man next to me has just gone.The seat is empty now.