Mrs White found her husband ______ by letters and papers and ______ very worried[ ]

The Yangtze River, China’s longest, has been affected by a severe drought, ________ the lowest level of rainfall this year since 1961

.______do they go to the movies —Hardly ever.

The ______ of the water in this area is tested(检测) every week.

In the last six to nine months，teens in the US to text messaging in numbers twice that in Europe and Asia