Linking verbs didn't seem to be too difficult for the eighteen participants. The one to give most of you a challenge was #5. Everyone thought the verb was "is" when it is part of a clause and cannot be the main verb. The linking verb in that sentence was "smells." Congratulations goes to Lily who was the only one to get it correct.
1. is
2. was
3. were
4. will be
5. smells
6. became
7. are
8. is
9. looked
10. were
11. tasted
12. will become
13. is
14. felt
15. is