If it __________for the snow, we ___________the mountain yesterday.
| A．were not; could have climbed | B．were not; could climb |
| C．had not been; could have climbed | D．had not been; could climb |
The physics teacher once said that we first _____the lightning followed by thunders because light ______ faster than sound.
| A．see; traveled | B．saw; traveled |
| C．saw; travels | D．see; travels |
You'd better _______ your score and see if you have passed the exam.
| A．add up | B．add to |
| C．add up to | D．add |
Would it be for you to pick me up at four o’clock and take me to the airport?
| A．free | B．vacant |
| C．handy | D．convenient |
— Excuse me, what's the time for Train 8201?
— It _____ at seven and you can wait in the hall.
| A．left | B．leaves |
| C．will leave | D．has left |
Li Hua has succeeded in the entrance examination and his dream ______ being a university student will ______.
| A．about; be true |
| B．from; turn into practice |
| C．in; become a fact |
| D．of; come true |