5 Choose the right item to use the complex object. 1 Nobody saw Andy to leave / leave the room. 2 Andy didn't want anyone tripping / to trip over him. 3 The mother heard her children telling / to tell scary stories. 4 We watched the baby to crawl / crawling on the floor. 5 I would like you to go / going to the library to exchange books. 6 I noticed my sister to put / put on a new sweater. 7 We expect the professor exploring / to explore that part of the country. 8 Have you heard Polina to sing / singing? She has got a sweet voice. 27