Question

【题目】Somebody called you just now, but I didn’t know ________.

A.who were theyB.who they wereC.who was itD.who it was

Answer 1

【答案】D

【解析】

句意：刚才有人给你打电话，但是我不知道它是谁。

考查宾语从句。宾语从句首先看语序，语序必须用陈述序，A，C选项从句部分的语序是一般疑问句的语序，故先排除；其次看主从句的时态，主句I didn’t know是过去时，从句用过去时态；不知道的某人或某物如敲门，接电话等，用it指代。故选D。