1-C. It has been generally thought that the first people to go to North America came from Asia over a bridge of land across the Bering Sea about 15,000 years ago.It has been generally thought that the first people to go to North America came from Asia over a bridge of land across the Bering Sea about 15,000 years ago.  

それは(形式主語)、一般的に考えられてきた、というのは、最初の人々は、北アメリカに行ったダヨ、アジアからダヨ、橋を渡ってダヨ、陸地のダヨ、ベーリング海のダヨ、約15,000年前にダヨ。  

2-C. The 15,000 runners will be determined by lottery.The 15,000 runners will be determined by lottery.  

15,000人のランナーは、決定されます、抽選によりダヨ。  

 Tweet