2.Vinh keeps forgetting his homework.
-Vinh is …………………………………………………………….
3.Keeping the environment clean is very important.
-It’s………………………………………………………………….
4.Old car tires are recycled to make shoes and sandals.
-People………………………………………………………………
5.It’s three years since I last spoke to her.
-I haven’t……………………………………………………………
6.Tam doesn’t type as fast as she used to.
-Tam used ………………………………………………………….
7.How long is it since you used the car?
-When ……………………………………………………………..
8.We started living here 15 years ago.
-We have…………………………………………………………...
9.Let’s meet inside the center, at the cafe corner.
-How……………………………………………………………….
10. I’ve never eaten this kind of cake.
-I t’s ………………………………………………………………..