—I did not know you were good friends. —You__________. I have known her since she moved here. You were abroad then.
If the price of oil remains ________ for the rest of 2013, I will consider buying a new car.
Mike did the homework ________ it took me.
With increasing working pressure, Anthony has ________ time to spend with his friends than before.
Though many extra trains and buses are used to carry passengers, traffic tools are still ________ needed during the Spring Festival.
Mary once taught English in a remote village school as a volunteer, which is ________ only on foot.