1.He became self-satisfied because of his ______.
A. interests B. observation C. behavior D. achievements
【解析】D。考查名词辨析。句意：他因为成就而变得自鸣得意。Interests兴趣，利益； observation观察，监视，观察报告；behavior行为；achievements成就。
2. John, look at the time. ___________ you sing songs at such a late hour?
A．Must B．Can C．May D．Need
【解析】A。考查情态动词。句意：约翰,看看时间。你必须在这么晚的时刻唱歌吗?Must必须；can能；may可能；need需要。
