The boy ______ for her in the rain for nearly half an hour before she appeared.
A. waits B. waited C. has waited D. had waited
Tu Yoyo is the first Chinese scientist ______ the Nobel Prize in Medicine.
A. won B. wins C. to win D. winning
The boy ______ down by a truck when he was running across the road.
A. is knocked B. was knocked C. will be knocked D. has been knocked
- Would you mind ______ my pet dog? I will be away for about a week.
- Of course not.
A. look after B. will look after C. to look after D. looking after
He became ______ again and left the office with a smile on his face.
A. happy B. happily C. unhappy D. unhappily
______ this is your first visit to Shanghai, let me show you around the city.
A. Although B. Since C. Unless D. When
