Hardly _____ when it started raining.

Hardly _____ when it started raining.
A、the game had begun
B、the game began
C、did the game begin
D、had the game begun
【正确答案】：D
【题目解析】：hardly 提前，因此要引起倒装，此处begin 在rain 之前，因此要使用过去完成时，因此D正确