They were_______ busy_______ with each other_________

试题详情及答案解析

They were_______ busy_______ with each other__________the time.

A．too; to talk; to forget

B．so; talking; that they forgot

C．so; to talk; that they forgot

D．too; talking; to forget

答案：B

试题分析：句意：他们如此的忙于交谈以至于他们忘记了时间。so …that，如此的······以至于······，后加从句。be busy doing sth,忙于做······。根据句意，故选B。
考点：考查固定句式的用法。