Question

Only when _______ 30 years old ______ to learn English. A．was he; did he begin B．he was; he.

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

Answer 1

C

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。