Question

—Has Tommyfinished his job yet?

—I have no idea ofit, he ________ it this morning.

1. A.
   was doing
2. B.
   had beendoing
3. C.
   has done
4. D.
   did

Answer 1

A
上文说“汤姆完成他的工作了吗?”下文说“不知道，又见他今早在工作”。工作的动作发生在从过去开始持续一段时间，至于现在完成否，不得而知，但今早他正在干，应该用过去进行时。