67. I'm sorry you've missed the train, it ________ five minutes ago. A. had left B. left C. has left D. has been left 68. I couldn't find John at the party last night. If we _______ him, we’d have been very happy. A. would meet B. met C. had met D. have met 69. Henry________ into the restaurant when the writer was having dinner. A. was going B. went C. has gone D. did go 70. We ________English this time last week. A. learned B. were learning C. have learned D. had learned 71. When I arrived at the party, Martha________ home already. A. went B. have gone C. had gone D. would go

`67`. B left 

- an hour ago: quá khứ đơn

- Cấu trúc quá khứ đơn: S + V2/ed

`68`. C had met

- Câu điều kiện loại 3: If + S1 + had + Vpp, S2 + would/could + Vpp

- Diễn tả điều không có thật trong quá khứ

`69`. B went 

- Henry went into the restaurant: hành động xen vào -> quá khứ đơn

- the writer was having dinner: hành động đang diễn ra -> quá khứ tiếp diễn

`70`. B were learning 

- this time last week: quá khứ tiếp diễn

- Cấu trúc: S + was/were + Ving

`71`. C had gone

- Hành động Martha đã về nhà xảy ra trước hành động "I arrived at the party" nên chia quá khứ hoàn thành

- Cấu trúc: S + had + Vpp

`67` B

`+` Dùng thì QKĐ `-` DHNB : five minutes ago

`->` Cấu trúc : S + V2/ed + (O)

`68` C

`->` Cấu trúc câu đk loại `3` : If + mệnh đề thì QKHT , would/could + Vpp

`69` B

`->` Cấu trúc : Mệnh đề thì QKĐ `+` when + Mệnh đề thì QKTD

`70` B

`+` Dùng thì QKTD `-` DHNB : this time last week

`->` Cấu trúc : S + was/were + V-ing

`71` C

`->` Cấu trúc : When + thì QKĐ , thì QKHT