He was unable to______ his niece’s wedding as he was ill.
Đáp án đúng là C: attend = tham dự. He was unable to attend his niece 's wedding as he was ill. (ông ấy không thể tham dự tiệc cưới của cháu gái vì bị ốm.)
be present at (= có mặt).
visit =viếng thăm (ai/nơi nào).
assist (= help) = giúp đỡ.