- 试题详情及答案解析
- I guess there must be someone outside the house. Let’s stop to listen.
A、speak B、speaking C、spoke- 答案：B
- 试题分析：句意：我猜一定有人正在房子外面讲话。让我们停下来去听听。A、speak 讲话，动词原形；B、speaking 讲话，现在分词；C、spoke讲话，过去式。must be，表示猜测。there be someone／something doing 有人／物正在做某事。故选B。
考点：考查非谓语动词