Under no ______ should you leave this city. After all, your family and friends live here.
A. conditions B.circumstances C.situations D.environment
正确答案是B。
还有under no conditions 和 under no circumstances中的conditon\circumstance是不是都既可以加s也可以不加?
即 under no condition 和 under no circumstance 这两种写法都对呢?