Teenagers social experience, so they are easily when they first step into society.
A. lack; taken up
B. lacking in; taken over
C. a lack of; taken on
D. lack; taken in
网友回答
A. lack; taken up
B. lacking in; taken over
C. a lack of; taken on
(答案→)D. lack; taken in
解析：考查lack的用法和词组：句意：年轻人缺乏社会经验，所以他们很容易被欺骗。第一空填lack，是及物动词，或者填are lacking in，第二空填taken in“欺骗，吸收，理解”，take up占据，从事，拿起，take over接管，take on承担，呈现，雇佣，选D。