题目内容
完成句子
He ________(不能解释)his absence for school these days and was punished．(account)
He was ________(失望的)that he didn't pass the exam．
He _____ ______（对……进行实验）rats.
根据汉语提示完成句子
He _______ _______ _______ _______（埋头忙于）research work in the past two years.
He ________ labels ________（给……贴）all his bags.
He interviewed two students, _________(两个都不想)to study abroad as exchange students．(dying)
