These animals are all used to their environment,______, they have learned how to live successfully in their habitat．

—What’s the matter with you, Tom?—______ the ladder, one of arms has been broken.

—______ Emily is in such a hurry?—I don’t know. She might run to catch the bus.

—_____is the best football player in your city?—Jerry.

We will see you again next Saturday. ______, you must rest as much as possible and take good care of yourself．