三选一用英语怎么表达Then they were randomly assigned to three conditio

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三选一用英语怎么表达
Then they were randomly assigned to three conditions,in which they either do A,do B or do 这样的表达应该不对,either or应该是二选一,该怎么改呢,

我认为应将either去掉,加one of the
Then they were randomly assigned to one of the three conditions,in which they do A,do B or do C.
另外do似乎应改为did,因为谓语动词是过去.

三选一用英语怎么表达Then they were randomly assigned to three conditio 英语翻译Soil samples were collected randomly up to a distanceof they were old then They were young,then. they were young ,then . 英语填空：Then they b____ to talk They watched the game,and then they were invited to ____ it If one were to ask a group of randomly selected individuals 这句话, 咋翻译；Level-B periods were randomly selected to be harmon 初二英语阅读理解急Once there were three old men.They were rather for then they‘ll listen to the school choir in the hall at three Then they'll listen to the school choir in the hall at three