In summer milk will quickly go bad _____it is put into a fridge.
| A．though | B．unless | C．because | D．once |
—Can you tell me _________ the prize, Tom?
—Last year．
| A．when you got | B．when did you get |
| C．when have you got | D．when you have got |
The farmer was very thankful to the doctor _________ saved his son．
| A．whom | B．which | C．who | D．whose |
—Would you like _________ Shijing Hill with us next Sunday afternoon?
—I will go with you unless my mother _________me．
| A．climbing ; refuses | B．climbing ; will refuse |
| C．to climb ; refuses | D．to climb ; will refuse |
—______ have you been learning English?
—Since seven years ago．
| A．How far | B．How long | C．How often | D．How soon |
I don’t study as ______ as Amy and always make more mistakes in my homework．
| A．carefully | B．more carefully | C．careful | D．more careful |