问题
选择题
—What were you doing when you heard Malaysian airlines flight lost?
—I my homework.
A．were doing.
B．am doing.
C．was doing.
D．is doing.
答案
答案：C
题目分析：句意：当你听到马来西亚的航班失联的时候，你正在做什么？--我正在写我的作业。分析：写作业的动作发生在听到马来西亚的航班失联的时候，体现过去进行时，构成be+doing. 主语是第一人称,因此Be动词用was.故选 C