Question

We entered the café and sat down by the window, waiting ________.

A．to serve B．to be served

C．serving D．served

 

Answer 1

B

【解析】答案：B　考查非谓语动词。根据句意，句子主语We与非谓语动词serve之间存在被动关系，且serve的动作尚未发生，故使用不定式的被动形式。