2. It was raining cats and dogs. The rain was coming .

Kiến thức về cụm thành ngữ
Tạm dịch: Trời đang mưa như trút nước.
→ Ta có cụm thành ngữ: rain cats and dogs = (rain) come down in torrents: mưa xối xả, mưa như trút nước
=> Do đó, ta viết lại câu như sau: The rain was coming down in torrents.

2. It was raining cats and dogs. The rain was coming ______________________________________________________.

2. It was raining cats and dogs.
The rain was coming ______________________________________________________.