Turn on CCTV news and we ________how happy our life is. But there is no denying that over the past decades, the cost of living ________ sharply.

A．are seeing; had increased

B．will see；has been increasing

C．see; increased

D．have seen; is increasing

如果教师在演示课件时，课件中链接的声音MP3格式无法正常播出，而其他的声音文件单独点能正常地播放那老师应采取的解决措施是（）。

A、重新安装声驱

B、下载安装最新软件

C、改变存放课件的上一级文件夹

D、先去掉声音图标，然后重新链接所需的声音文件