— He ______, for he is enjoying his favourite album.

A. must have B. can have C. must D. can

【答案】A

【解析】

考查情态动词。句意：--他已经完成作业了吗？--他肯定写完了，因为他正在欣赏最喜欢的专辑。根据句意可知，此处是表示对过去的肯定推测，must have done sth.表示肯定做了某事。故选A。