The little girl is walking along the beach, happy and joyful, ________ bending down to pick up a beautiful seashell.

In the bubble years, lending standards slipped ______,allowing   many people to put far too much of their income into paying for their housing.

We should unite, for no country _____can solve the problem of the pig flu.

It is said that this project will take ________ two to three years, and cost about 200 million yuan.

Interviews were carried out ________ over the telephone，via e－mail or fax or face to face in four cities including Beijing，Shanghai，Guangzhou and Wuhan.