5、Britaintosay“Thankyou”tothedrivers_peoplegetoffthebus.A.afterB.sinceC.untilD.when()2.(2009·湖北宜昌)--- Listen! It is still noisyin thehead teacher’soffice.---Go and see___________theyhavefinished correcting thepapersyet.A.though B.whetherC.unless D.while()3.(2009·湖北孝感)_____Switzerlandisvery