How can you expect to learn anything ____ you devote all your energies to playing computer games?
| A．in case | B．while | C．when | D．unless |
Xiao Li was about to cheat in the exam ________ the teacher came up, smiling to him.
| A．as | B．when | C．while | D．until |
You can find me easily, for there is only one house _______ roof is flat.
| A．whose | B．of which | C．of that | D．that |
I shall never forget the days ______ I stayed in Africa, ________ has brought me a lot of advantages.
| A．that; which | B．when; which | C．when; that | D．which; that |
Never before in my life ________such a beautiful girl with so many high qualities.
| A．I met | B．did I meet | C．I have met | D．have I met |
—— Don’t smoke today, honey, it’s three months since you smoked.
—— OK, I ______.
| A．do | B．don’t | C．will | D．won’t |