Join each pair of sentences by using that, who or whom. Put the connectives that can be omitted in parentheses. 1. The motorbike had driven ahead of the others for some time. It suddenly had a puncture in the front tyre. 2. The professor gave us a lecture on American history. He was elected head of the English Department. 3. The lorry ran over his leg. The leg might have to be severed. 4. You helped the old man onto the bus. He happened to be my grandfather. 5. The hut inclined a little. It was pulled down last week. 6. You picked the flower this morning. It has withered. 7. You chose an assistant. He proved to be very capable. 8. The young man specializes in business management. He has been appointed the manager.