课堂练习
ⅰ. 根据下列各句句意以及所给单词的首字母或汉语提示,写出该单词的正确形式。
1. out of s___________ for the homeless children he gave them shelter for night.
2. these valuable paintings were in an excellent state of _____________ (保存).
3. the chinese people will __________ (目击) the most important scientific development of the century.
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