Question

They were _____ busy _____ with each other _______ the time.
A too, to talk; to forget
B. too, talking; to forget
C. so, to talk; that we forget
D. so, talking; that they forgot

Answer 1

D

解析试题分析：句意：他们忙着聊天以至于忘了时间。be busy doing sth 忙于做某事 ；so…that…如此……以至于……，be动词用“were”说明是过去时态，后面动词也应用过去式，应该用“forgot”而不是“forget”。故选D。
考点: 考查固定短语及句式。