Identify the subject and complete verb in each of the following sentences.

Please go to the store and buy some milk for the baby.
a. you; go/store
b. you; go/buy
c. store; go/buy
d. milk; go/buy

Is it D

No, not D.

Learn how to recognize subjects:
http://www.chompchomp.com/terms/subject.htm

Learn how to recognize verbs:
http://www.chompchomp.com/terms/verb.htm

Then it is B

Yes, b.

No, the correct answer is option a. You; go/store. In this sentence, the subject is "you" and the complete verb is "go to the store." The phrase "and buy some milk for the baby" is an additional action that is connected to the main action of going to the store.