英国广播公司世界广播电台
参考答案：
它是英国从事对外广播的机构。
— Bruce, you are late again!
—Oh, I'm sorry, sir. I _____ earlier, but the alarm clock didn't work. [ ]
A. must have got up
B. could have got up
C. might have got up
D. should have got up
根据RTGA面板灯说明RTGA的状态。
