Question

Mr. Smith ________ his pupils how to prepare for the test since 8 am, but no one listens to him...

Mr. Smith ________ his pupils how to prepare for the test since 8 am, but no one listens to him. A．has told　 B．is telling C．has been telling　 D．will have told

Answer 1

C

句意：Mr.Smith从早上8点开始就一直在不停地告诉学生们如何准备考试，但没有一个学生听他讲。空处的动作从过去某一时间开始一直延续到现在，可能还要继续下去，因此应用现在完成进行时。故答案选C。