题目

题型：不详难度：来源：

Only when _______ 30 years old ______ to learn English.

A．was he; did he begin

B．he was; he began

C．he was; did he begin

D．was he; he began

答案

C

解析

考查部分倒装。Only+时间状语从句，放在句首时，后面主句要部分倒装，而从句不倒装。所以选C。