Question

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

1. A.
   to test out
2. B.
   to have been tested out
3. C.
   to be tested out
4. D.
   to be testing out

Answer 1

C
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。
考点：考查固定句型
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。