What was it that caused the party to be put off? the invitation.A. Because Tom delayed sending B. T

【题目】----What was it that caused the party to be put off? ----______________ the invitation.

A. Because Tom delayed sending B. Tom delayed to send

C. That Tom delayed sending D. Tom delaying sending

【答案】C

【解析】

试题分析：句意: 究竟是什么导致聚会被推迟？是Tom送请柬的时间推迟了。That Tom delayed sending the invitation.是直接回答了what，是主语从句，而省略了It was …that caused the party to be put off. 故选C。