He asked me ì I had seen a UFO before.
All flights were cancelled because of fog.
1. " Have you seen a UF0 before" ? He ask me
\(\Rightarrow\) He asked me ì I had seen a UFO before.
2. They carcelled all flights because of foy
\(\Rightarrow\) All flights were cancelled because of fog.

giúp mk vs ạ mk cần gấp ạ









