1. The education in Japan _____ if the basic principles of education had not been taken into consideration. A. would go down B. would have gone down C. went down D. had gone down 2. Ifhe ______ a thorough knowledge of English, he could have supplied for this post. A. had had B. had C. has D. has had

1. had not been: quá khứ hoàn thành

-> Câu điều kiện loại 3

Cấu trúc: S + had + PII, S + would/could have + PII

Đáp án: B

2. could have: câu điều kiện loại 3

Cấu trúc: S + had + PII, S + would/could have + PII

Đáp án: A

`1.` `B` would have gone down

`2.` `A` had had

`=>` Câu điều kiện loại `3`

`=>` Cấu trúc: If + S +had + V3/-ed + O, S + would/ could + have + V3/-ed + O

`=>` Cấu trúc: S + would/ could + have + V3/-ed + O, If + S +had + V3/-ed + O