21．—Jim didn’t turn up last time, didn’t he?
—No．He ．We had changed our plan．
A．didn’t need to come B．needn’t have come
C．doesn’t need to come D．needn’t come
22．After three hours’ climbing, we stood at the top of the hill, ．we can see the whole town
A．from which B．which C．that D．from where
