根据所给汉语意思，完成下列句子。每空一词，注意正确形式。 小题1:我送老李一些礼物回报他的帮助。 I gave Lao Li some gifts  ___________ _________  for his kind help. 小题2:美国曾经一度和伊拉克交战。 There was a time _______ the U.S.A. was _____war with Iraq. 小题3:我对你们所说的“古代城堡”感兴趣。 I am interested in _______ you call “______ Castle”. 小题4:我们班长受到大家高度评价。 Our monitor is ________ ________ of by all of us. 小题5:众所周知，吸烟对健康有害。 _______ is known, smoking _______ great harm to our health.