review OG16 正确句子合集遇到小问题：

白冬冬 · 发表于 2016-6-12 21:34:32

9. In a review of 2,000 studies of human behavior that date back to the

1940s, two Swiss psychologists declared that since most of the studies

had failed to control for variables such as social class and family size,

none could be taken seriously.

这里的since 是引导原因，翻译为“因为”对吗？

如果since 要引导时间状语从句，从句时态应该是一般时，对吗？

白冬冬 · 发表于 2016-6-12 22:46:50

顶顶，求nn!!

白冬冬 · 发表于 2016-6-12 23:17:47

求nnnnnnnnnnnnnnnnnn....

[SC悬赏令] review OG16 正确句子合集遇到小问题：