78. I Keep my reference books near my desk for　　 (方便).　　　　　 　　　　　 78. 　　　

77. The retired worker is very 　　　(热心的)about neighborhood affairs.　 77. 　　　

将答案答在每题后面的答题处.

76. He takes up _____(科学的)studies.　　　　　　　　　　　　　　　 76.　 　　

35. In the reading room we found her ___ at a desk, with her attention ___ on a book.

A sitting; fixing 　B sit ; fixed 　C seated ; be fixed　 D seated ; fixed