21. In face of _______ failure, it is most important to keep up _____ good state of mind.
A. a; 不填 B. 不填; a C. the; 不填 D. 不填; the
【解析】选B。 failure作“失败”讲时为不可数名词，前面不加冠词。keep up a good state of mind 固定短语 “保持好的心态”。
22._______ the most important thing in your life？
A. Do you think what is B. What do you think is
C. What is your think D. What is do you think
【解析】选B。句意为：你认为在你一生中最重要的事情是什么？do you think为插入语，常放在特殊疑问词之后。
