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问题描述：
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That man is always trying to _his wealth in fornt of others
A:show off B:put off c:set off d:turn off
为什么
The 2008 Olympic Games will _ lots of opportunities to China.
A;get B:take C:bring D:have
为什么
My brother_as an engineer since he came back form the United States.
A;had worked B:works C:wored D:has wored
为什么
The students had finished their class-work defore four_?
A:have not they B:had not they C:did not they D:do not they
为什么
答
1.show of是炫耀的意思.而句中有一个单词是"wealth''意思是财产.很显然,他是在炫耀自己的财产.而“put off”的意思是推迟；“set off”的意思是出发；“turn off”的意思是关掉.2.have是"有''的意思,奥运将会有机会...