一道GWD语法~不太明白that的用法～请求高人指点!!!谢谢！

我是红色音符

这道题是＂The fact of some fraternal twins resembling each other greatly and others looking quite dissimilar highligts an interesting and ofter overlooked feature of fraternal-twin pairs,namely they vary considerably.＂
答案是That some fraternal twins resemble each other greatly while others look quite dissimilar highlights an interesting and ofter overlooked feature of fraternal-twin pairs,namely that they very considerably on a spectrum of genetic relatedness.
请问that的用法是什么啊～能够放在句首吗？请大家能够说说自己想法吗？谢谢！！！

yidiyuehan

我在Manhattan SC Guide 里面看到的是 that 放在句首在英语语法里面是对的, 但是GMAT 认为是错误的. 至少目前为止我没有看到GMAT 有选它对的.

a10285

that应该是因为主语从句的引导连词才不能省吧~