单选题A survey suggests that&nb

问题补充：

单选题AsurveysuggeststhattheroyalweddingofPrinceWilliamandKateMiddleton_____agreatboostforBritisheconomybecausealargenumberofvisitorsareexpectedtogo.A.will beB.has beenC.wasD.be

答案：

A解析本题考查时态。根据宾语从句中because a large number of visitors are expected to go从句用一般现在时，故主句用将来时态。选A。