21. Reading classics such as The Analects（Lun Yu）could help children improve themselves and have_______ better understanding of _______ life.
A. a; 不填 B. 不填；不填 C. the; the D. 不填；the
【解析】选A。考查冠词。第一空处have a better understanding of. . . 意为“对……有更好的理解”；第二空后的life此处泛指“生活”，其前无需用冠词。
22. Many people in the world claim that they have seen UFO with their own eyes, _______ I personally doubt.
A. what B. when C. that D. which
【解析】选D。考查定语从句。关系代词which指代前面整个主句的内容，引导非限制性定语从句，并在从句中作doubt的宾语。
