—What is Lucy doing now?—She a book. A. readB. readsC. reading D. is reading

问题补充：

—What is Lucy doing now?

—She a book.

A. read

B. reads

C. reading

D. is reading

答案：

A. read

B. reads

C. reading

(答案→)D. is reading

解析：句意：露西现在正在做什么？——她正在读书。根据上文，可知下文描述的是现在正在进行的动作，故用现在进行时态，选D。