Chia động từ trong ngoặc để hoàn thành câu

1. We (study)....a very hard lesson the day before yesterday 
2. l (read)....that novel by Hemingway several times 
3. We (study)... almost every lesson in this book so far.
4. My wife and l (travel).....to Mexico by air last summer 
5.l (have)....a little trouble with my car last week
6. What you (do).... yesterday?
7. How long you (learn)..... English?
8. Tôm (never be )....in Ha Noi 
9. The plane (stop)....at a small town.lt then (take)....off immediately after refueling.