I find ________ difficult to remember everything, though I’m still young.
What should we _______ in class? We should pay attention _______ notes when necessary.
My parents want me to get further study to be ____ an engineer _____ a scientist,______ I would like to be a famous surgeon doctor.
We all know that learning a foreign language ______ time and effort.
I find ____ useful _____ English well.
----Do you like chatting with your friends on the telephone or mobile phone?----_________. I would rather __________ QQ.