Giúp em vs aa

`25`
`=>A`
`=>`How many children does she have? Two sons and two daughters
`26`
`=>A`
`=>`John is cleaning the room at the moment
`*`Dấu hiệu nhận biết at the moment
`#`S + be + V-ing
`27`
`=>B`
`=>`He usually swims at the weekend
`*`Dấu hiệu nhận biết at the weekend
`#`S+V(s/es)+O
`28`
`=>`Vietnam has a lot of beautiful lakes
`29`
`=>`There aren't any deserts in our country
`30`
`=>`Vinh is the tallest student in our class
`31`
`=>`How often do you go to our painting clup
`32`
`=>`You must do your homework before going to school