The substance can be added to gasoline to accelerate the speed of automobiles.

admin2009-06-15  31

问题 The substance can be added to gasoline to accelerate the speed of automobiles.

选项 A、quicken
B、shorten
C、loosen
D、enlarge

答案A

解析 accelerate,v.加速,促进,所以A“加快”是答案shorten,v.缩短,(使)变短; loosen,v.解开,放松,松开;enlarge,v.扩大,放大。词缀-en通常加在某些形容词的前面或后面,使其变成相应的动词,该词缀的含义是“使变得更加……”,如:enlarge就是“使变得更大/扩大。”
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