It is he often fails in the exams makes his parents worried about him.—— So, he has to work whole- heartedly.

She searched all the places where she _____ have left her necklace but it was all in vain.

将下列选项中的词语依次填入各句横线处，最恰当的一组是 ①为了纪念世界反法西斯战争胜利60周年，俄罗斯邀请了世界50多个国家和国际组织的       人物参加庆典活动。 ②在改革开放的新形势下，我们仍然要从实际情况出发，从中探索出固有的而不是         的规律。 ③放学时间还没到，集体活动还没结束，你怎么能         离开学校呢

n’t selfishly keep for himself the money inheritedfrom his uncle Instead, he made a ______ contribution to help the community

My father gave me much________ on how to make a kite.