—What is that noise?—Oh I forgot to tell you that the new machine .A. was testedB. will be

问题补充：

—What is that noise?

—Oh,I forgot to tell you that the new machine .

A. was tested

B. will be tested

C. is being tested

D. has been tested

答案：

A. was tested

B. will be tested

(答案→)C. is being tested

D. has been tested

解析：考查时态和语态。由上一句中的一般现在时可知说话者询问的是现在的噪声是怎么回事，故答话中应用现在进行时表示目前的情况；同时，机器应是被测试的，故用被动语态。