original: all other subjects may be sat in either ordinary or higher levels .
simplifications: all other subjects may be sat in either ordinary or higher levels . all other subjects may be sat in either normal or higher levels . all other subjects may be sat in either ordinary or higher levels . all other subjects may sit in the ordinary or higher levels . all other persons may be sat in either normal or higher levels . all other subjects may be sat in either ordinary or higher levels . any other subject can be seated in ordinary or higher levels . all other subjects may be placed in either ordianry or higher levels .