5.The last time we visited Kuala Lumpur was two years ago. It’s…………………………………………………. 9.When did you start working in that factory ? How long ………………………………………….? 10. It isn’t necessary for students to wear uniforms today. Students…………………………………………………. các bạn nhớ giải thích nhé:33

`5.`It's two years since we last visited Kuala Lumpur.

`->`The last time + S + V2/ed + was + time

`=`It's time + since + S last + V2/ed

`6.`How long have you worked in that factory ?

`->`When + did + S + start + Ving ?

`=`How long + have/has + S + Vpp ?

`7.`Students don't have to wear uniforms today.

`->`It isn't necessary + for O + to V : không cần thiết đối với ai để...

`=`S + don't/doesn't have + to V

`=>`Tạm dịch : Học sinh không cần mặc áo đồng phục hôm nay.