Look back at the text again. find sentences with that / which / who. what do these words mean? complete the following sentences: 1. the pamphlet was written by voltaire (that/ which/who) was a 2. voltaire wrote a letter (that/which/who) only 3. the publisher sent an answer (that/which/ 4. all copies of the pamphlet (that/which/who) was written by voltaire умоляю