Ring me at 5 am? No, better not so early! I _________. —I got it. [ ]

It was the building of the rail network from the west to the east coast ________ brought even larger numbers to California in the 1860s.

下列句子中，没有语病的一项是（ ）

He is not good at English, and neither ___ good at French.

It is important to know about the cultural differences that______ cause problems．