—Kathy and her sister are so alike.—I can’t tell one from ____.
________ the course very difficult, she decided to move to a lower level.
Though they met for the first time, they talked ________ they were good friends.
Once the new rules are made,what matters much next is how they will be________to all the members of the club.
I felt very tired when I got home. and I _______ straight to bed.
Nowadays, many people walk to work ________ Copenhagen Conference calling for living a low-carbon lifestyle to cope with global warming.