He succeeded in solving all the problems _____.

Some parents are just too protective. They want to their kids from every kind of danger, real or imagined.

Harry lived in London for three months,______ he learned some English.

I _______ have been more than six years old when the accident happened．

Tom, do you know where Jiayou supermarket is—Sorry. This city is unfamiliar ________ me. You canask Bill. He is familiar ________ this place.