问题
单项选择题
It was now clear that no such weapons were manufactured and none been found.
A. was found
B. were founded
C. has been found
D. have been founded
答案
参考答案：A
解析： 本题考查句子时态和词义辨析。由于“and”连接的两部分属并列关系，所以，句子前后时态应一致，应为一般过去时。又因为find“发现”的过去式是found，founded是found“建立”的过去式，根据题意可知，A为正确答案。