Being quick-minded and good at communicating, the young man was appointed to address the tough problem _______ the company.
——Don’t forget to return the book on time. ——________.
—I’m terribly sorry to have given you so much trouble. — ______
You may ______ it that Jennifer will come and help us if we are in trouble.
How long do you think it was ______ he got home in such bad weather?
—We are worried about Tom. Why hasn’t he come back? —Don’t worry. He ______ in a traffic jam.