`35`. D She asked what Steve was doing in the garden

`->` Câu trần thuật có từ để hỏi: S + asked + O + từ để hỏi + S2 + V lùi thì 

`36`. B This school was not as good as my last one

`->` So sánh không bằng: S + be + not + as + adj + as + O 

`37`. C Although the hotel was noisy, we stayed there.

`->` Although + S + V = Despite + N/Ving: mặc dù 

`38`. C The last time she played the piano was 5 years ago.

`->` The last time + S + V2/ed + was + thời gian + ago = S + have/has + not + Vpp + for + thời gian 

`39`. B Our house was bought last year

`->` Câu bị động quá khứ đơn: S + was/were + Vpp 

`40`. A Helmets must be worn at all times when riding a motorcycle.

`->` Câu bị động với " must": S + must be + Vpp