Open the brackets using the proper form of the infinitive or participle: 1. i heard him (to speak) to his friend about his voyage to far-away countries. 2. they wanted us (to do) this work as soon as possible. 3. for a long time they watched the girls (to play) tennis. 4. we didn't expect him (to be) so rude with his parents. 5. the revolution made lots of people (to leave) their native country. 6. i can't let you (quarrel) on trifles. 7. he was known (to be) an ethnologist and a linguist. 8. all of sudden she felt her limbs (to tremble). 9. the teacher was closely watching the students (to write) the dictation. there was no way to peep into a scribble.