合金铸铁堆焊金属，按不同的成分和堆焊层的金相组织，可分为( )。A．马氏体合金铸铁

阅读下面短文，掌握其大意，然后从方框中选出能填入文中空白处的最合适的单词，并将该单词的标号(A、B、C、D、E…)填写在文章下面对应题号的横线上。注意：方框中有多余的单词。

A. began   B.after   C. picked   D.heard  E.only   F.if G.and H.carry    I.first.   J.countries  K. held   L. before M. listened

Maybe the word "hello" is used more often than any other one in the English language. Every one in the United States and other  小题1: uses the word, again 小题2: again, every day of the week. The American inventor Thomas Edison is believed to be the   小题3:   person to use "hello" on the telephone soon   小题4: the invention of it. At first, people  小题5: their words on the telephone with "Are you there?" They were not sure the small machine could really 小题6: voices. Edison was a man of few words. He wasted no time. The first time he  小题7: up the telephone, he did not ask 小题8:  anyone was there. He was sure someone was there and   小题9:  said "hello". From then on, "hello" is often   小题10:  when you picked up the telephone.