— we’ve been trying hard, but can’t solve the problem—I think you can ____it in another way
I think students _____ to do homework with friends.
It is important for us _____ our English.
My mother used to ______ what she did every day.
---We can use QQ to talk with each other on the Internet. ---Really? Will you please show me it?
Could you please me tell me ________?