1. If we plant more trees, our neighborhood will be greener.

2. If we cycle to school every day, we will keep the air clean and fresh.

I/

1. If we plant more trees, the neighbourhood will be greener.

(ĐK 1: If + S + present simple, S + will/can/... + V1)

2. If we cycle to school everyday, we can keep the air clean and fresh. (Sử dụng công thức như câu 1)

3. Da Nang have the most beautiful beaches in Vietnam.

(So sánh nhất: S + to be +the most + adj + (N) )

II/

5. Why does Bob like the comedy? (Có từ "because" :bởi vì -->Dùng từ để hỏi "Why": vì sao)

6. Where is London? (Có từ "on" -->Dùng từ để hỏi "Where" :ở đâu)

7. When did the Effei Tower first open? (Có  "in + năm" chỉ thời gian nên dùng "When")

Chúc bạn học tốt!