You should keep working hrd ________ you hve pssed the ...
单项选择题You should keep working hrd ________ you hve pssed the exm.ifB.becuseC.whenD.even thoughYou should keep working hrd ________ you hve pssed the exm.if B.becuse C.when D.even though
A.ifB.becauseC.whenD.even though