A吧How long is it since I arrived?
如果用B,就应该是I have arrived,而不是has arrived
如果用C,句意不通,when是一个时间点,不是多长时间
如果用D,as I arrived,也是我到达了
A吧How long is it since I arrived?
如果用B,就应该是I have arrived,而不是has arrived
如果用C,句意不通,when是一个时间点,不是多长时间
如果用D,as I arrived,也是我到达了