43. What does the underlined word "clutter" in Paragraph 3 probably mean?

　　 A. Change.　 B. Improve.　　 C. Strengthen.　　　 D. Confuse.

42. According to the new research, ___________.

　　 A. the importance of working memory has been long recognized

　　 B. working memory is becoming recognized as a factor in intelligence

　　 C. laziness can weaken working memory

　　 D. working memory helps people remember things forever

41. Which of the following is a characteristic of working memory?

　　 A. It has a limited capacity.

　　 B. It is usually better in children than adults.

　　 C. It improves with use.

　　 D. It can cause a lack of attention.

39．had removed．因为remove这个动作发生在过去动作changed, 1ifted，was happy，were glad等的前面，所以要过去完成时。

38．suitable．(be) suitble for固定搭配，形容词短语作后置定语，修饰前面的slow, solemn music。

37．before．仪式是在埋葬死人之前举行的，所以用before。

36．his．根据这句话的最后一个单词him可以得知答案。

35．When．引导一个时间状语从句。

34．forced．与前面的“they were sold并列，省略了they were。