Medicine shouldn’t be kept _____ it is accessible to children. [ ]

Suddenly the idea came to me ____ I mightturn to Mr．Smithfor help．

The book, ________ to tell people how to learn English as ________ second language, is very helpful for beginners.

59. She was, I thought, the best novelist（小说家）in the world because she told us a large number of stories about her life in Africa.

I have _______ work to do, and I am ________ tired.