I haven’t seen Mary recently. And you?Me neither. I’m afraid she to her experimen

问题补充：

--- I haven’t seen Mary recently. And you?

--- Me neither. I’m afraid she to her experiment for too long a time.

A. is devoting

B. was devoted

C. has been devoting

D. has been devoted

答案：

A. is devoting

B. was devoted

C. has been devoting

(答案→)D. has been devoted

解析：考查时态。固定词组be devoted to致力于。根据上下文可知我最近没有空间Mary,是因为她致力于做实验。使用完成时表示过去发生的事情对现在的影响。