Question

【題目】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

Answer 1

【答案】B

【解析】

考查時(shí)態(tài)和語態(tài)。句意：如果水被加熱到沸點(diǎn)，它就會被變成蒸汽。句中if引導(dǎo)條件狀語從句，根據(jù)is判斷為一般現(xiàn)在時(shí)，結(jié)合主將從現(xiàn)原則，主句應(yīng)用一般將來時(shí)，water和謂語動詞turn…into…（把……變成）之間是動賓關(guān)系，故用被動語態(tài)，即一般將來時(shí)的被動語態(tài)will be done，故選B項(xiàng)。