ASMO Asian English Olympiad 2022 — Level 5 — Grade 10–11 — School Category Question 17

ASMO English · ASMO Asian English Olympiad 2022 — Level 5 — Grade 10–11 — School Category

Question 17

Henry promised to email me __________ he arrived in London.

1. while
2. until
3. Since
4. as soon as