—What's that noise?—Oh I forgot to tell you.The new machine .A. was testedB. will be teste

问题补充：

—Whats that 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：

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。根据语境判断，此处表示“新机器正在被检测”，因此此处用现在进行时的被动语态。