The waterfall can be seen____Its sound may be heard ____twomiles.It looks even morebeautiful ____, I think[ ]

That must have been a long trip．—Yeah, it us a whole week to get there

This kind of paper was as soft and light as silk but ______ expensive.

_______do you surf the Internet ?—Once a month.

now aims to boost domestic demand, and this______ would help the global economy.