1 . Mongolian wrestling is different from the wrestling in the Olympic Games. There are no rounds, and wrestlers are ________. The wrestler loses if any part of his body above his knee touches the ground. （根据句意填空）

2 . 这事在三个不同的场合发生过。
It happened on three ________.

3 . They want to_________teaching from research.
他们想把教学和研究分开。