The librarians ________ the books in the library as novels，which are popular with us.

No person __________ carry a mobile phone into the examination room during thenational college Entrance Examinations．

he Internet is of great help, Idon’t think it ‘s a good idea to spend too much time on it

She ______ to Africa to study the animals there, though her family asked her not to.

Excuse me, but can I sit here — _________. The man who sat here will be back soon.