The health organization is ___________ its tenth anniversary this year.
-Sorry, I couldn’t find the suitable shoes you need. - .
rise in carbon dioxide is causing steady increase in global warming.
We should get prepared for dealing with ________problems_________.
---You’ve read the Frog by Moyan,haven’t you? ---Yes,I_______second time and I got a better understanding.
We’ll never forget this terrible accident and the damage_______has caused to the area.