Ответ:

I just have to reply to a few emails and then I've finished.

Do you spend much time on social networking sites?

My bedroom is a nice size. There's plenty of room for a desk.

I know very few people who speak two foreign languages.

My brother has downloaded a lot of apps onto his new phone.

I have some cash on me, but not a lot.

Their new TV is too big. It hardly fits in the living room.

There aren't any potatoes. I forgot to buy some.

My niece isn't old enough to play with a games console.

I don't have a lot of friends on Facebook.