1. He told her that she          her teacher the day before yesterday.
     A. visited            B. will visit             C. had visited                D. visits
2. The majority of the doctors          smoking is harmful to health.
A. believe          B. believed              C. knows                   D. believes
3. My wife’s mother          with us this week.
A. was staying     B. stayed                 C. didn’t stay              D. is staying