Don’t forget _____ the tap when you don’t use it.
A. turn off B. turn on C. to turn off
Though we are very tired, ________ we are very happy．
| A．but | B．as | C．so | D．/ |
-Can you come to my house on Wednesday afternoon ?-______________
| A．Sure, I'd love to． | B．Sorry, I don't． |
| C．Sure, I'd like． | D．Sorry, I am not． |
Though the doctor advised Alice strongly that she should take a good rest, ______didn’t help.
| A．she | B．it | C．which | D．he |
Alan is a careful driver, but he drives _________ of my friends.
| A．more carefully | B．less carefully | C．the most carefully | D．the least carefully |
–You can’t imagine _______ great fun chatting online is.
– Really? But it may cause you a lot of trouble.
| A．what | B．how | C．why | D．whether |