Question

【题目】He stood up, (发信号) to the officer that he had finished with his client.

Answer 1

【答案】ignaling
【解析】句意：他站了起来，向长官示意他已经和他的客户完成了工作。句中主语He和动词signal是主动关系，而且已经有了谓语动词，故此处用动词-ing形式作伴随状语，故填signaling。