汽车加速行驶时()。
A、Ft≥Ff+Fw+Fi+Fj
B、Ft=Ff+Fi+Fj
C、Ft>Ff+Fw+Fi+Fj
D、Ft<Ff+Fw+Fi+Fj
参考答案:C
We are looking forward to _________ a chance to watch the opening ceremony of Shanghai World Expo.
A.give
B.be given
C.being given
D.Giving
—Who is laughing in the room?
— _____ must be Lucy.
A. She
B. It
C. This
D. He