15．omit vt. 省略

　　16．settler n. 移民；定居者

　　17．switch n. 开关

　　18．structure n. 结构；体系

　　19．rapidly adv. 迅速地

　　20．cute adj. 逗人喜爱的

　　21．distinctive adj. 与众不同的

　　22．criticise vt. 批评

　　23．standard adj. 标准的

　　24．edition n. (广播、电视节目的)期；__版

　　 [用所给词的适当形式填空]

　　1．They confused me by asking so many confusing questions. I was totally confused,__standing there in confusion,__not knowing what to do.(confuse)

　　2．The reference book the teacher referred to just now is said to be popular among students.(refer)

　　3．All students were present at the meeting on Teachers' Day. Some students presented flowers to the representatives of teachers as festival presents．(present)

　　4．Leaves are found on varieties of trees, but they vary greatly in size and shape.(vary)

　　5．From the appearance, we can not tell the differences between the twins, though they always have some different ideas. As for this phenomenon, ideas differ among many people.(differ)

　　1．have...in__common 有相同的特点

　　2．make__a__difference 有影响，使不相同

　　3．get__around 四处走动(旅行)

　　4．be__similar__to 与......相似

　　5．lead__to 引起；导致

　　6．in__favour__of 同意；支持

7．refer__to...as... 称......为......