WhenIreachedthefarm,mysonhappened

问题详情：

When I reached the farm, my son happened ________ on the grass, ________ the hens________ eggs.

A. lying; watching; laying               B. to have lain; watch; laying

C. to lie; and watched; lay              D. to be lying; watching; laying

【回答】

知识点：分词

题型：选择题