-----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
网友回答
A. was tested
B. will be tested
(答案→)C. is being tested
D. has been tested
解析： 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。