【题目】Water ______ into steam if it is heated to its boiling point.
A.is going to be turnedB.will be turned
C.has been turnedD.is being turned
在线课程【答案】B
【解析】
考查时态和语态。句意：如果水被加热到沸点，它就会被变成蒸汽。句中if引导条件状语从句，根据is判断为一般现在时，结合主将从现原则，主句应用一般将来时，water和谓语动词turn…into…（把……变成）之间是动宾关系，故用被动语态，即一般将来时的被动语态will be done，故选B项。