—I'm sorry I didn't make it to your party last night. — __________. I know you're busy these days.
I ________ that I won’t tell anyone your secret. You should trust me.
Not until I began to work______ how much time I had wasted.
It is an interesting old document but there are a lot of words I can”t .
Only ____ as a volunteer ____ how important it is to grasp English.
Yesterday Jane walked away from the discussion. Otherwise, she ____ something she would regret later.