35, There are over eight hundred stamps in Tom’s collection.

Tom’s collection has over eight hundred stamps.

39, The library contains over 30 million books.

There are over 30 million books in the library.

46, The meeting lasts for two hours.

It is a two-hour meeting.

47, They are building a bridge which is two kilometers long.

They are building a two-kilometer long bridge.

48, The trips lasts ten days.

It is a ten-day trip.

49, The recess lasts thirty minutes.

It is a thirty-minute recess.

51.My sister couldn’t swim last year.

My sister wasn't able to swim last year.