Bats are surprisingly long-lived creatures, some _______ a life span of around 20 years.
I hope that the little ________ I have been able to do does good to them all.
There are several research centers in China ________ a certain disease called Bird Flu is being studied.
The treatment will continue until the patient reaches the point ________ he can walk correctly and safely.
October 15 th is my birthday, ________ I will never forget.