ter how carefully you plan your finances, no one can _____ when the unexpected will happen.

Grandpa has changed a lot.- So he has. He spends more time than he used to ______ gameswith the children.

When I talked with my grandma on the phone, she sounded weak, but by the time we ________ up, hervoice had been full of life.[ ]

Scientists ______ SARS for several monthsbefore a major discovery was made in the field.

the recent river pollution in Shanxi Province ,people ____ more and more attention to the water quality.