Do you know how many pages this book has?

• Correction: Change "does" to "has".

I'm really looking forward to meeting my old friend living in HCM city.

• Correction: Change "to meet" to "to meeting".

Children now spend more time on the internet than watching TV.

• Correction: Add "more", change "on internet" to "on the internet", and change "than watching TV".

I'm really bored when I watch documentaries.

• Correction: Change "boring" to "bored".

Many people work hard every day to produce TV programmes.

• Correction: Change "wprk" to "work", "hardly" to "hard", and "every days" to "every day".

4 days is too short for us to go on holiday abroad.

• Correction: Change "are" to "is".

I often don't come late for my piano lessons at the music club.

• Correction: Change "don't come late" to "don't arrive late".

There were fewer pieces of furniture in our room in the past than there are these days.

• Correction: Change "fewer furniture" to "fewer pieces of furniture", and rephrase "than these days" to "than there are these days".