There are over eight hundred stamps in Tom’s collection

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

Tom’s collection …………………………………………………

39, The library contains over 30 million books.

There ……………………………………………………………

46, The meeting lasts for two hours.

It is ……………………………………………………………

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

They are building ………………………………………………

48, The trips lasts ten days.

It is ……………………………………………………………

49, The recess lasts thirty minutes.

It is ……………………………………………………………

51.My sister couldn’t swim last year.

My sister wasn’t …………………………………………………