The nutrients in _____falls into the ocean quickly become available to other living creatures.

--- ________ of them knows the answer. What can we do now?  --- Let’s ask a third boy for help.

At your company there are a few machines similar to      described in this magazine.

We’ll never forget this terrible accident and the damage_______has caused to the area.

There are a lot of trees on _______________ sides of Century Avenue in Pudong.