Question

The robot Tony was said        already in Larry’s house before he returned.

A．to test out	B．to have been tested out
C．to be tested out	D．to be testing out

Answer 1

B

试题分析：考查句型：sb/sth is said to do/to have done,如果是将要做，用不定式一般式to do如果是已经做了，用不定式的完成式，句意：据说机器人Tony在回来前已经在Larry的家里做过实验。Tony和test out是被动关系，用不定式完成式的被动。选C。
点评：固定句型是学习语言的重要环节。sb/sth is said to do/to have done,可以转化成It is said that句型，解答这类题目，关键是理解题干意思从而判断是动词不定式的什么形式，根据意思放入句子中进行比较，不难选出正确答案。