Giúp mình với ạ cíu mình với ạ Mình cảm ơn nhiều ạ

Choose the best answer 1. She came into the room while they ....television. have watched a. watched 2. I......a headache since yesterday. a. had b. was having 3 When he failed to meet us, we ..........without @left b. would leave 4. It's an hour since he a. is leaving b. was leaving 5. ...