. Reading this instructive book, ___________ .

Hello, is Mr Smith in—Sorry, there is no such person _______ you referred to in my office.

Cross the road carefully, _________ you’llkeep yourself safe.

I waited for my friend for a long time at the bus station，but she didn’t________at last．

The report was not concrete and in a way lacked persuasion, but ______, I felt it is fair