where _ he he_to the library.A have been,went B have been ,have been C has been,went

问题描述:

where _ he he_to the library.A have been,went B have been ,have been C has been,went
继续上面的“D has been,has been"

D主语是he,当然使用has
不过,我觉得如果答句也用完成时是不是更好?