23．— What’s that terrible noise．David? — Oh I forgot to tell you．The new machines in the n

问题补充：

23．— What’s that terrible noise．David?

— Oh，I forgot to tell you．The new machines in the nearby plant ．

A. were tested

B. will be tested

C. are being tested

D. have been tested

答案：

A. were tested

B. will be tested

(答案→)C. are being tested

D. have been tested

解析：可联系答.案.网客服索取。