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1,I felt it rather inappropriate to turn up at the graduatio

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1,I felt it rather inappropriate to turn up at the graduation ceremony ______ jeans and T-shirt.
A,in
B,on
C,by
D,with
为什么选A不选D
2,To help today's customers make a choice,a company in New York ______ a video trolley — a supermarket trolley with a video screen to display advertisement and price information.
A,has invented
B,had invented
C,invents
D,is inventing
为什么选A不选C
3,The symbolic one-hour switch-off first ______ in Sydney in 2007 has become an annual global event.
A,to hold
B,being held
C,to be held
D,held
为什么答案选D不选C
4,At least 200,000 people were reported ______ in the ever recorded worst earthquake that struck Haiti last winter.
A,being killed
B,to be killed
C,killing
D,to have been killed
答案为什么选D不选B
5,Many scientists believe that now we can study the behavior of a three-year-old child to see ______ they will grow up to be criminals.
A,that
B,how
C,why
D,whether
为什么答案选D不选C
1,I felt it rather inappropriate to turn up at the graduatio
1.A穿着衣服用in ,with是拿着衣服
2.has invented 表示过去发明的,现在在起作用,而invents 的一般现在是表示经常发明的概念
3.to be held 表示将要做的事情,held 表示做过的事情,相当于that was held ,这跟后面的时间是想关的
4.to have been done 表示的是在reported 之前发生过的事,to be done 在这里表示同时或即将发生的事情.
5.see 后面表示观望是否这个三岁孩子会成长为罪犯的.意思上用why 也说不通,三岁的孩子怎么就成了罪犯呢?
如果用why 的话,后面的时态也不应该是将来时啊