Question

He set off       his missing dog.

A．in search for

B．search for

C．search of

D．in search of

Answer 1

D

考查短语：search for 和 in search of为了寻找什么，题中已经有了谓语动词，故用介词短语作状语，句意：他出发了为了寻找他失踪的狗。故选D。