1.It was not until 1920 _______ regular radio broadcasts began.
A. that
B. since
C. when
D. while
【精析】A 并且被强调的对象为until引导的时间状语从句,所以应用that来引导。
2.He apologized ____ having to leave so early.
A. because of
B. with
C. owing to
D. for
【翻译】他因为不得不早退而道歉。
[考点]词语搭配【精析】D apologize for sth./doing sth.为固定搭配，表示“为(做)某事而道歉”。because of:因为;with：用，随着;owing to:因为，由于，均不能与apologize搭配。故选D。
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3.When people become unemployed, it is ________ which is often worse than lack of wages.
A. laziness
B. poverty
C. idleness
D. inability
【精析】A 名词词义辨析题：A. 懒惰，无精打采;B. 贫穷;C. 空虚，无聊;D. 无力，无能。
4.It has been the same old story ever _______ he was a little boy.
A. after
B. since
C. when
D. from
【精析】B 时间状语从句题：本句主句动词为完成式,从句动词为一般过去式,要用由ever since“自从……”引出的状语从句。
5.Before leaving the village, he visited the old house____ he spent his childhood.
A. in whichB. whichC. to whichD. at which
【翻译】在离开村庄前，他去看了那栋他曾在那里度过童年的老房子。
[考点]定语从句
【精析】A 分析句子结构可知，空处引导的是一个定语从句，修饰表示地点的先行词the old house，从句中缺少地点状语，所以空处应用in which或关系副词where，在从句中作地点状语，相当于in the house。故选A。
