He is not ( ) to be present at the

选B.因为主语是人称,经常用 be likely to“有可能”的意思.而其它几个词虽然具有“有可能”,但不用于人称后面,只能用于,it is pobbile that he will be present at eh meeting tonigh.这类句式.
be likely to 倒是可以用it is likely that .