$\text{5 was arriving => arrived}$

_ Thì quá khứ tiếp diễn : S + Was/were + Ving

_ thường thì : When + Quá khứ đơn, S + Was/were + Ving

$\text{6 too much TV => TV too much}$

_ V + N + too much : làm việc gì quá nhiều

$\text{7 was learning => had learnt}$

_ Thì quá khứ hoàn thành : S + had + PII

$\text{8 was => had been}$

_ Thì quá khứ hoàn thành : S + had + PII

_ Sau been + Ving 

@nguyennhuquynh06

5. When the bus was arriving, we missed it because we were talking. -> arrived
6. During the Christmas holiday, I was eating too much and watching too much TV! -> TV too much
7. Jullian was learning all about computer games by the time he was six. -> learnt/learned(kiểu cũ)
8. My grandfather was owning a hotel by the beach until he sold it last year. -> had been

~ Xin ctlhn ạ ~