---Was Mary in the reading room when you arrived there?---Yes but she soon afterwards. A.

问题补充：

---Was Mary in the reading room when you arrived there?

---Yes,but she soon afterwards.

A. had left

B. left

C. would leave

D. was leaving

答案：

A. had left

(答案→)B. left

C. would leave

D. was leaving

解析：可联系答.案.网客服索取。