1. building / tallest / the / is / this / city / the / in / world.

=>This is the tallest city building in the world.

2. Lan' s house / smaller / is / this / house / my / than.

=>Lan's house is smaller than my house.

3. she / never / with / camping / goes / her / friends.

=>She never goes camping with her friends.

4. often / she / go / does / how / cinema / to / the ?

=>How often does she go to the cinema?

It's over 6,000 kilometers long.