根据所给汉语意思，完成下列句子。每空一词，注意正确形式。
我送老李一些礼物回报他的帮助。
I gave Lao Li some gifts  ___________ _________  for his kind help.
美国曾经一度和伊拉克交战。
There was a time _______ the U.S.A. was _____war with Iraq.
我对你们所说的“古代城堡”感兴趣。
I am interested in _______ you call “______ Castle”.
我们班长受到大家高度评价。
Our monitor is ________ ________ of by all of us.
众所周知，吸烟对健康有害。
_______ is known, smoking _______ great harm to our health.