问题

The two old friends werebusywitheach otherthe time.— Yes. They haven’t met for long.
A:too, to talk;to forget
B:too, talking;to forget
C:so, to talk;that they forgot
D:so, talking;that they forgot
B:too, talking;to forget
C:so, to talk;that they forgot
D:so, talking;that they forgot
正确答案是: