Students often ____________ their best wishes on the blackboard before graduation.
cut down
pull down
write down
die down
--What would you do if you ____ a million dollars? --I’d give it to the charity
Can you call me when you ________ home?
We are from China and we _______ Chinese.
Some students are so ______ that they often make mistakes in their homework.
__ we are young, we can still do something to help protect the environment.