/drink)coffee at 6 o' clock yesterday

1. were shown

2. are developed

3. is being discussed

4. is being built

5. are devoted

6. is known

7. are being prepared

8. were done

9. was being cooked

10. are being sold 

1. have you been saving

2.  have you saved

3. have you been buying

4. have you bought

5. have you been doing

6. have done

7. has been writting

8. has played

9. have been saving