根据下面的首字母提示或汉语提示写出能填入该句的正确单词。
（1） Only by working hard can you a__________(获得) a good knowledge of law.
（2） He has made up his mind to face the ________(挑战) and solve the problem.
（3）Don’t _______(暴露) yourself to the sun for too long.
（4）He was a _______ (安排) by his family to marry a girl of his own class.
（5） His _______ (以 前 的) attempt was successful.
（6） The minister _______ (批准) the building plan yesterday.
（7） I will t_______ (请客) you all to dinner..
（8）They a_______ (帮忙) in solving the problem.
（9）They would i _______ ( 告诉) him of any progress they had made..
（10） I will be back in an i_______ (马上) .