Task One: Finish the sentences according to the requirements. 1. My mother put Cathy to bed. The doorbell rang. (Make one sentence with “while”.) 2. I telephoned a friend. Bob came in. (Make one sentence with “when”.) 3. This factory opened twenty years ago. (Synonymous sentence) 4. The bus has arrived here. It arrived ten minutes ago. (Make one sentence.) 7. I bought a new bike just now. (Rewrite the sentence with present perfect.) 8. I have been there for two days . (Question based on the underlined part.) 9.They have built a new school in the village . (Question based on the underlined part.) 10.Jack has already finished his homework. (General question.)