A、 Better memories.
B、 Better study habits.
C、 More efficient ways of conveying information.
D、 Greater abilities to deal with complex tasks.

【正确答案】 C

【答案解析】解析：细节辨认题。短文中提到adults have many advantages over children：better memories，more efficient waysof organizing information，beaer study habits，and greater ability to handle complex mental tasks．可知A、B、D都是成年人学习语言的优势，选项C conveying information在文章中没有提及，故选C。

A、 They can spend more time in mastering language.
B、 They don' t make things more complex.
C、 They have a good memory.
D、 They are not afraid of making mistakes.

【正确答案】 A

【答案解析】解析：事实细节题。短文中提到…children who can devote more time to language mastery，可知与成人相比，儿童可以花费更多的时间来学习语言，故选A。

A、 Because they have complex communication needs.
B、 Because they don' t want to appear stupid.
C、 Because they are always in a hurry.
D、 Because they have to finish work first.

【正确答案】 B

【答案解析】解析：信息明示题。短文中提到Because most adults do not like to appear foolish，they often deny themselvesopportunities to practice for fear of making mistakes，所以B正确。

A、 Who are the better language learners, children or adults?
B、 Why do adults learn a foreign language?
C、 What are the advantages and disadvantages of adults in learning language?
D、 What are the troubles and worries of adults in learning language?

【正确答案】 C

【答案解析】解析：主旨大意题。短文首先讲与儿童相比，成人学习语言的优势，接着第二段又讲了成人学习语言的劣势。由此可知选项C正确。