Mary learnt how to____a bicycle in her childhood.

Mary learnt how to____a bicycle in her childhood.
A、open
B、ride
C、drive
D、guide
【正确答案】：B
【题目解析】：open 打开；ride 骑；drive 开（车）；guide 引导句意：玛丽小时候就学会了如何骑自行车。