Ex5: Sắp xếpcâu I their train / yet / arrived / hasn't Their train hasn't arrived yet 2 since / Sam / hasn't / Monday / phoned Trevor / home / gone / has / already for / rained / months/it/ hasn't 5 Kathy / asleep / been / has / how long? 6 you / yet / to the shops / been / have? 7Mark / come back / from France / just / has 8 breakfast / we/ yet / had / haven't