`1`. Mr Hoang spent half an hour walking to work yesterday.
-> S + spend + thời gian + Ving
`2`. How much is this cap ?
-> How much does this cao cost ?
`3`. Lan has two older sisters
`4`. Our house is the oldest house in the living centre.
`5`. Mai is usually a hard - working.
`6`. Hoa's collection has eight hundred stamps
`7`. What is the price of this book ?
`8`. Watching TV isn't as interesting as listening to music.