If you want a double room, _____ will cost another ￡15.
| A．as | B．which | C．what | D．that |
It was playing computer games that cost the boy plenty of time that he ______ have spent studying.
| A．might | B．must | C．could | D．ought to |
After released(释放) from prison, the young man ______ a living by running a small restaurant.
| A．produced | B．formed | C．earned | D．performed |
---It’s a long time since I saw my parents.
---______ them this weekend?
| A．Why not to visit | B．Why not visit | C．Why not visiting | D．Why don’t visit |
---You are always full of ______. Can you tell me the secret?
---Taking plenty of exercise and going on a balanced diet everyday.
| A．energy | B．strength | C．force | D．power |
---Guess what? I have got A for my term paper.
---Great! You ______ read widely and put a lot of work into it.
| A．must | B．should | C．must have | D．should have |