It was not until then that I came to know that knowledge _______ only from practice.

We should consider the students’ request _________ the school library _________ more books on popular science.

More rescue teams went to the ________ areas after Sunday’s earthquake and tsunami in the Indian Ocean. [ ]

30．The new curriculum advocates allowing students more time toparticipate in_______is referred to as community service.

From the _____ expression on her face, we knew that she was very _____ with the result.[ ]