George returned after the war, only _______ that his wife had left him. [ ]

_________ for his invitation the other day, I should not be here now.

I’m sorry. I ______ at you the other day. —Forget it. I was a bit out of control myself.

My sister speaks English＿＿＿＿＿, if not better than, my brother.

I think English is useful language,and it’s also important language.