Question

He is sweating heavily. He _______ weightlifting for a long time.

A．could have practiced

B．can practice

C．must have practiced

D．might practice

Answer 1

C

试题分析：考查情态动词。根据第一句内容可知，这是对过去的肯定推测。句意：他流了很多汗。他肯定已经练习举重很长时间了。故C正确。