—Why do you look so worried?
—My computer broke down and my essay ______ unfinished since.
| A．had left | B．has left | C．was left | D．has been left |
第二部分：知识运用（共两节, 满分35分）
第一节单项填空（共15小题；每小题1分，满分15分）
请认真阅读下面各题，从A、B、C、D四个选项中，选出最佳选项,并在答题卡上将该项涂黑。
It is believed that ______ European chemist called Felix Hoffmann first produced ASA which completely changed ______ man’s understanding of aspirin.
A. an; a B. the; a C. a; / D. an; /
The possibility that he knew about the stolen files cannot be ________.
| A．made up | B．looked into | C．ruled out | D．turned out |
Parents are ________ to be invited to this year’s New Year party.
| A．possible | B．probable | C．like | D．likely |
—Did you lend him some money?
—No. It ________ that I didn’t have any extra money with me.
| A．turned | B．looked | C．happened | D．appeared |
The policeman came up to the lonely house with the door open, ________ there for a while and 
then entered it.
| A．stood | B．standing | C．to stand | D．having stood |