________ fun it is to relax ourselves in a nature reserve 15 km ________ south of Hangzhou!
Just in front of our house ___ with a history of 1,000 years.
___ most of the earth’s surface is covered by water, fresh water is very rare and precious.
Some experts think that language learning is much ___ for children as their tongues are more flexible.
The parents suggested ___ in the hotel room but their kids were anxious to camp out during the trip .
We ___ our new neighbors yet, so we don't know their names.