语法与词汇 20.Barry had an advantage over his mother______he could speak English.
【正确答案】 B
【答案解析】在给出的选项中：since that意为“自从那时候”；in that意为“因为”；at that意为“而且，就那样”；so that意为“以至于”。根据句意和各个选项的意思可知，正确答案是B。