Question

英语连词成句were,that,it ,long ,walk,other,to,they,so,took,time,si

Answer 1

Because they were so big that it took a long time to walk to the other side. 最后连接的句子只能这样了，但是个人觉得这个句子的because有点多余，so。。。 that 的用法已经包括这个意思。