1) ____ my friend ___ are taking the geography class.?

2) Do you want to go swimming _____ golfing?

3) I studied grammar for a long time, _____ I still make mistakes.

4) _____ wood ____ bricks can be used as home building materials.

5) I wasn't feeling well this morning, ____ I had to go to work.

6) Could you email me ____ you receive the offer?

7) I want to buy it ____ it is expensive or not.

8) Don't do that ____ I allow it.

9) ____ you are confident with it, you should go for it.

10) I didn't enroll this semester _____ I could go backpacking in Europe.

11. My neighbor's cat has been missing ______ last Friday.

12. _____ I own a house, I am required to pay property taxes.