在VCD机中，视频信号与音频信号是经过（）电路后分离开的。
A、数据选通电路
B、数字信号处理电路
C、音频信号解码电路
D、数模转换电路
参考答案：C
The composers soon began to write musical dramas about Bible stories ______ in church.
A．to perform
B．performing
C．to be performed
D．be performed
My brother is really___ . He often works in his office far into the night. [ ]
A. open-minded
B. hard-working
C. self-confident
D. warm-hearted
