I had to show him my identity card and ________ A. only then he let me in B. only then did he let me in C. did he let me in only then D. did only then he let me in36/50I had to show him my identity card and ________ only then he let me inonly then did he let me in did he let me in only thendid only then he let me inGiải thíchChọn đáp án B