---- There is only three days left, but w still have a pile of papers to deal with.---- Don’t worry. We have already __________ two thirds of them after all.
By the end of this year, we _____ 2000 English words.
_______ knows the truth will tell you about it , I think .
The head engineer is in ________ the project .
______ began our new lesson.
I didn’t manage to do it _____ you had explained how.