Thestudents           busilyintheclassroomwhenMissBrown...

问题详情：

The students            busily in the classroom when Miss Brown came in to get the book she            .

A．had written; left                                          B．were writing; has left

C．had written; had left                                    D．were writing; had left

【回答】

D

知识点：动词时态与语态

题型：选择题