We feel ________ our duty to make our country a better place.[ ]

Lily was busy _______ ready for the examand was made ______ in her room thewhole afternoon.

The tigers are in great _______ //.

Now more and more Chinese senior studentsare applying for admissionto American universities through SAT．—_______．But taking an SAT may cost more than 10,000 yuan．

14. Over the long process of evolution, animals have developed their ______ senses, which makes it possible for them to _____ their environments.