ASMO Asian English Olympiad 2022 — Level 3 — Grade 5–6 — School Category Câu hỏi 22

ASMO English · ASMO Asian English Olympiad 2022 — Level 3 — Grade 5–6 — School Category

Câu hỏi 22

Henry promised to email me __________ he arrived in London.

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