Without a (an) ______passport a tourist is forbidden to enter a country.A、operat

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问题 Without a (an) ______passport a tourist is forbidden to enter a country.

选项 A、operative
B、effective
C、valid
D、efficient

答案 C

解析此题考查形容词的词义。四个选项都有“有效”的意思，但它们的含义有所不同。valid意为“有效的，合法的”，通常指证件等合法、有效；operative指法津、法规，规定等“有效的”；effective常指方法或措施有效，强调能达到预期效果；efficient可以指人有能力或指某方法有效，强调“通过最短的时间和最少的精力达到预期效果。”因此C为正确选项。

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Without a (an) ______passport a tourist is forbidden to enter a country.A、operat

Heistooweakto______hisbusiness.A、dowithB、dowithoutC、doawaywithD、dou

BeforeNewYear,thousandsoftouristsremained______abroadduetothesnowstor

Theman______heranswerwithouttheslightestclueastowhatshewouldsay.A、an

Dr.Johnson______thepatientofthesafetyoftheoperations.A、guaranteedB、conf

Itishardtoimaginealargecitywithoutpolicemen,butsuchwasthe______inL

Heunderwentfour______operationsintwoweeks.A、excessiveB、extensiveC、intensi

Itisunusualforthere______somanytouristsonthebeachatthistimeofthe

Customs______arepaidongoodsenteringthecountry.A、moneyB、billsC、dutiesD、f

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