Question

We were ________ busy ________ with each other ________ the time.

[　　]

A. too, to talk, to forget

B. too, talking, to forget

C. so, to talk, that we forgot

D. so, talking, that we forgot

Answer 1

答案：D
提示：

so... that...，“如此……以至……”，so前面是连系动词时，后面接形容词，so前面不是连系动词时，后面接副词；be busy doing sth.“忙于做某事”。