问题
选择题
-----What is the noise?
-----Oh, I forgot to tell you. The new machine _________.
A．was tested
B．will be tested
C．is being tested
D．has been tested
答案
答案：C
根据-What is the noise，可知是现在正在进行的动作，所以新机器应是正在被测试。用现在进行时态的被动语态。