7.The research is so designed that once ____________ nothing can be done to change it.[NMET2002]
A.begins
B.having begun
C.beginning
D.begun
【简析】答案为D。once begun在句中作条件状语,它是状语从句once it is begun的省略形式,句意为:这项调查研究事先计划的如此完好,以致于一旦开始,什么也无法改变它。
8.Generally speaking, ______according to the directions, the drug has no side effect. (2003’上海)
A. when taking
B. when taken
C. when to take
D. when to be taken
【简析】完整的说法应是when the drug is taken according to the directions,…由于主句的主语和从句的主语相同,因此可以省略从句的主语the drug和谓语的一部分is,答案为B。当然也可以省去when。【】 A.Compare
B.When comparing C.Comparing
D.When compared
【解析】本题考查过去分词作时间状语,可以将原句子改为:“When the biggest ocean is compared with size of the whole earth, it doesn’t seem big at all.”选择D选项。
. _________ the right kind of training , these teenage soccer players may one day grew the international stars.
09江西)
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