---Mum, I’m really ________ about the result of the exam.---Cheer up. I believe you can be successful.
I am sure that you’ll ______ the difficulty.
They have been skating______ 2 hours ago.
----Why don’t you go to the movie with me?-----Because I _______it already.
____ useful the computer is!
Do you remember what ____ at 11:00a.m yesterday?