Bài `4:`
`1`. A How much time a day do you spend on playing game?
`->` spend + thời gian + Ving/ on ST: dành thời gian làm gì
`2`. B Nick has just bought a CD of Vietnamese folk songs and he thinks he’ll enjoy listening to the melodies.
`->` Hiện tại hoàn thành: S + have/has + just + VPP
`->` think + S + will + Vinf
`3`. D Ping doesn’t mind doing a lot of homework in the evenings.
`->` (not) mind + Ving: không phiền làm gì đó
`4`. C Marie likes window shopping with her close friend on Saturday evenings.
`->` on + thứ , like + N/Ving: thích
`5`. D Why don’t we help our parents with some DIY projects?
`->` Why don't we + Vinf ?
`->` help + SO + with ST: giúp ai đó làm gì