一、
1.How could we live without the Internet? That's _____ most of us keep in touch with each other.
2.As is well known to all, the Spring Festival is _____ the family are reunited and celebrate the new year.
3.He is not the best candidate for the position. So the problem is ____ we can get to replace him.
4.What the doctors really doubt is _____ my mother will defeat the serious illness.
5.One reason for her preference for city life is _____ she can have easy access to places like shops and restaurants.
