1. Running is my favorite sport and it can help to _______ me _______. (使…强壮) 2. Is the boy _______ _______ (喜欢) collecting toys? 3. Your must ask your brother not to ________ _______(熬夜) late at night. 4. As a doctor, I think ________ ________ (关心) the patients is my duty. 5. Tigers and lions both ________ ________ (以…为生) small animals. 6. When you look up a word in a dictionary you must ________ _______ (注意) to the first letter of the word. 7. Last Sunday some workers were ________ ________ (推倒) an old house while I was sleeping at home.