单选题_______ snacks and drinks

问题补充：

单选题_______snacksanddrinks,buttheybroughtcardsforentertainmentwhentheyhadapicnicinSouthBankParklands.A.Not only they did bringB.Not only did they bringC.Not only brought theyD.Not only they brought

答案：

B解析考察倒装句。当not only 放句首时要用部分倒装，即提前be动词，助动词，情态动词。