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1.We are now in amodern world and everything is developing r

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1.We are now in amodern world and everything is developing rapidly.Isn't it time wue ( _) our old ideas?
A must change B changed C can change D have to change
2.Nearly all the writers I konw admit that they had little idea( )they were going when they begin to write.
A Which B that B where D what
3.( )and happy .I accepted the unexpected present and thanked my cousin for it .
A Astonnishing B Being astonished C Astonished D To be astonishing
4.They were asleep leaving the door open because the door( )
A.wouldn't lock B.hsn't lock B wasn't lock
1.We are now in amodern world and everything is developing r
第一题选d,前文交代的是形式,那么改变旧思想就是形势所迫,所以用have to不得不.
第二题选where.they were going 是idea的同位语从句,表示idea的内容.go是不及物动词,所以副词性质的where.
第三题选c.and是连词,前后应该成分相同,happy是形容词,那么前面也应该用形容词,这里只用a 和c是形容词,又因为主句的主语是人,修饰人的是Astonished ,Astonnishing 是用来修饰物的.
第四题的选项不全,望补充上.