21. If we cut down more forests , there will be more floods.
Câu điều kiện loại 1 : If + S + Vhtđ, S + will/can/shall + V(infinitive)
22. Mary's good at playing the piano.
Cấu trúc : s + tobe + good at + V_ing/N
23. There is a computer room and a library in the school
Cấu trúc : There is + singular noun
24. Does the house have a garden at the front?
25. Where is your address?
Cấu trúc : Where + be + subject?