We’re leaving for Libya tomorrow. — Oh, I’d rather you _______. They say life security is no guarantee there.[ ]

He is a man with rich experience, from ______ much can be learned.

Some students even have no idea of　　　they are studying, so they are aimless most of the time

A number of tourists _________ Yangzhou many timesbecause it is such a beautiful city.

With a lot of difficult problems ________,the manager felt like a cat on hot bricks. [ ]