1, B going -> to go
intend +to + V
2, B go -> gone
QKHT before
3, B will -> would
said thành câu tường thuật nên will phải đổi thành would
4, C studying -> to study
decide +to +V
5, A am -> were
If S V2,ed, S would V
6, A will -> would
(said thành câu tường thuật will phải đổi thành would
7, C to -> in
result in nghĩa là dẫn đến
8, D had had-> were having
đây là câu QKHT
9. B pollute -> pollution
10, A Has -> Have
tom and susan ngôi thứ ba phải dùng have
11, A pollute -> pollution
12, B wants -> wanted
Câu TT lùi HTD -> QKD
Question 13, B