B) Give the correct form of the verbs in parentheses. Do not refer to the passage until you finish your exercise. 用括号中动词的正确形式填空，完成练习后再对照课文，核对你的答案。
1. Basketball is a much - loved and active sport that (enjoy) by many for fun and exercise.
2. It is over 100 years old and (play) by more than 100 million people in over 200 countries.
3. It (believe) that the first basketball game in history (play) on December 21, 1891.
4. Basketball (invent) by a Canadian doctor named James Naismith, who was born in 1861.
5. When he was a college teacher, he (ask) to think of a game that (play) in the winter.
6. Dr. Naismith created a game to (play) inside on a hard floor.

Ⅲ. 1. is enjoyed 2. is played 3. is believed, was played 4. was invented 5. was asked, could be played 6. be played