thestudents--busilywhenmissBrownwenttogetabookshe---intheoffice.A.hadwriteen,leftB.werewriting,haslefeC.hadwriteen,hadleftDwerewriting,hadleft

Question

the students--busily when miss Brown went to get a book she---in the office.
A.had writeen,left B.were writing ,has lefe
C.had writeen,had left Dwere writing ,had left

Answer 1

the students--busily when miss Brown went to get a book she---in the office.
A.had writeen,left B.were writing ,has lefe
C.had writeen,had left D.were writing ,had left
我选择D!
大意;布朗女士去拿她落在办公室的一本书的时候学生们正在忙着写作.
很明显主句是the students__busily而when引导后面的句子做主句的时间状语.最容易确认的就是后面一个空,因为left这个动作肯定在went这个动作之前的也就是过去的过去自然要使用过去完成时,这样AB就可以排除.
然后通过句子大意,既然她去办公室拿书自然学生们是在忙这些做如果是had written的话她就没时间去拿书了,所以选择D绝对是完全正确的!