Question

— I think your father is very busy.
—So he is._______ he still takes a walk with us sometimes.
A. So          B. And        C. Or          d. But

Answer 1

D 

连词的用法。so因此，表结果；and又，而，表并列或承接；or 或者，否则，表示选择；but但是，表转折；根据句意，他确实很忙，但有时他仍然与我们一起散步。故选D。