— do you exercise?
— Twice a week.
| A．How long | B．How many |
| C．How often | D．How soon |
----- How soon will you start your journey?
-----I’m not sure. I haven’t decided ________.
| A．when shall I ask the boss for leave |
| B．where I will go to spend the holiday |
| C．if I would go by train or by plane |
| D．who should I travel with |
I never doubt ______ the science museums are worth_______.
| A．whether，visiting | B．that, to visit |
| C．whether , a visit | D．that ,a visit |
-----Jenny, you should prepare as much as you can______ the coming guitar competition successfully!
-----Sure, I will try my best, Mr. Brown!
| A．to fail | B．to cover |
| C．cover | D．fail |
-----Wow, Anna, you look so great in your new coat!
-----Thanks. I ______ it when it was on sale.
| A．bought | B．have bought |
| C．buy | D．had bought |
You had better say “Thank you” when you __________ with the medal.
| A．present | B．presented |
| C．are presented | D．were presented |