What great trouble we had where his house was.
A. finding
B. to find
C. find
D. found
网友回答
(答案→)A. finding
B. to find
C. find
D. found
解析：考查非谓语动词：have trouble (in) doing sth. 的词组，in可以省略.表示“在做某事方面有困难.”，这里trouble作了先行词,后面由that(代替trouble)引导定语从句,作宾语,故省略了that，句意：我们找到他的家有多难啊，选A。