Question

He ______ be sitting at the gate, waiting for his lost son.

A．used to           B．was used to        C．could             D．was accustomed

Answer

A

【解析】

试题分析：句意：他过去常常坐在门口，等候他的失踪的儿子。used to do过去常常；was used to doing习惯于；was used to do被用来；could能够；be accustomed to doing 习惯于。根据句意故选A。

考点：考查动词短语辨析。