When last valuable, these books enjoyed great success [ ]

It is obvious to the students____ they should get wellprepared for their future.[ ]

The fact that somany people still smoke in public place ___that we may need nationwide campaignto raise awareness of the risks of smoking

He used to _____ with her parents, but now she is used to ____ with her classmates at school.

Can you explain how it _______ that you missed the morning classes