what is the linking verb in this sentence: Penicillin, one of our most important drugs, come from mold.

The answer is comes.

Explanation:

Also fun fact im allergic to Penicillin! Yay :)

1.the hosts on two opposing mountains stood,  

2.thick as the foliage of the waving wood;  

3.between them an extensive valley lay,  

4.o'er which the gleaming armour pour'd the day,  

5.when from the camp of the philistine foes,

6. dreadful to view, a mighty warrior rose; in the dire deeds of bleeding battle skill'd,

it might be feelings and action sorry if i am wrong