1.It/ convenient/ live/ city. A. It is convenient living in the city. B. It convenient because you live in a city. C. It is convenient to live in the city. D. It is convenient when you want to live in city. 2.Only/ work/ hard/ the students/ pass/ exam. A. Only by working hard can the students pass the exam. B. Only with work hard the students can pass the exam. C. Only by working hard, the students can pass the exam. D. Only the students work hard can they pass exam.