Tom knew nothing about it ( ) his sister told himA since B if C until
问题描述:
Tom knew nothing about it ( ) his sister told him
A since B if C until
答
C until
not..until------直到。。才;不到。。不;一到。。就
答
C 与 not ……until 相类似
答
C
Tom knew nothing=Tom didn't know any thing
not...until...知道...才...