问题
听力题
根据下面每句句意、汉语提示及英语解释，选出空白处所缺单词的正确形式。
小题1:Martin Murray is a _______（15岁） boy．He used to be a “problem child”.
小题2:—How do you study for a test?
—I study by ______（听） to tapes．
小题3:I’m very ______（担心）about my son’s health．
小题4:He didn’t do well in English ,so he wanted to (make better) it．
小题5:The big building has been here for two ____（one hundred years）．
答案
小题1:fifteen-year-old
小题2:listening
小题3:worried
小题4:failed
小题5:centuries
题目分析：
小题1:数字-+单数名词，构成复合形容词，故填fifteen-year-old
小题2:by,介词，后加名词或动名词，故填listening
小题3:be worried about 担心···，故填 worried
小题4:根据句意，可知他想提高英语，故填improve，
小题5:one hundred years 一百年是一个世纪，两个世纪，故用复数，故填centuries