---Mary was asked to do something important.---It doesn’t matter. Let’s the work where it is left off.
By the time we reach that page, we ___________ twenty lessons of the book.
On hearing the bad news, he got up quickly ______ the lunch unfinished.
The girl looked at me with a _______expression. Maybe the problem was quite ______.
Would you please ______ your statement again? I don’t understand what you were saying.
---How long has the United Nations ________? --- ______1945.