21. In order to find______ better job, he decided to study ______ second foreign language.
A. the; a B. a; a
C. the; the D. a; the
【解析】选B。考查冠词。句意：为了找到一个更好的工作，他决定再学习一门外语。第一个a表示泛指；a second (. . . )又一。
22. He quite appreciated ______ to the ball.
A. inviting B. to be invited
C. being invited D. having invited
【解析】选C。考查非谓语动词。句意：他非常感激能被邀请来参加舞会。appreciate常接动名词作宾语，且he与invite为动宾关系，故此处应用动名词的被动形式。
