Question

【题目】Sherlock Holmes asked the suspect what he ________ when the murder took place.
A.was doing
B.has done
C.is doing
D.would do

Answer 1

【答案】A
【解析】句意：夏洛克·福尔摩斯问怀疑他在干什么凶杀案发生时。句子时态为一般过去进行时，故选A。