第一节 单项填空（共15小题，每小题1分，满分15分）
从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
—I’m calling to say good-bye. I’m flying home tomorrow.
— .
| A. I’m sorry to hear that.C. I’m not sure. B. Congratulations!D. Have a nice trip! |
Mary went to the box office at lunch time, but all the tickets____ out.
A． have sold |
B．would sell | C．was selling | D．had sold |
She found her calculator _____ she lost it.
| A．where | B．when | C．in which | D．that |
For breakfast, he only drinks juice from fresh fruit____ on his own farm.
| A．grown | B．being grown | C．to be grown | D．to grow |
Leaves are found on all kinds of trees,but they differ greatly_____ size and shape.
| A．on | B．from | C．in | D．by |
When the H1N1 virus____ at first in Mexico, no one had the least idea that it would spread so rapidly throughout the world.
| A．broke off | B．broke down | C．broke out | D．broke away |