一When did you learn the news that Obama made a trip to Canada as President?
一 ____ was on my return．
| A．That | B．It | C．There | D．This |
Make good preparations for your self-driving trip ______ you’ll regret it when your car breaks down in a remote area.
| A．and | B．so | C．but | D．or |
--- Do you mind if I close the window?
--- ______. It’s so hot in here.
| A．Better not | B．Of course not | C．Do please | D．You bet |
Sometimes in summer, when ______ sun is rising, you can still see ______ clear moon hanging in the sky.
| A．the, the | B．a, the | C．the, a | D．a, a |
______you are always optimistic and self-confident, I can't wait to make friends with you.
| A．Though | B．Since | C．While | D．So |
——How many of you made it to the top of the mountain in the end?
——______. It was really tough.
| A．No one | B．Neither | C．None | D．Nobody |