Response to the following:
Read the following sentences, and focus on the grammar area specified in the left column. Then, select the correct sentence (a or b) for each number and providing an explanation of why you made that choice.
Subject-verb agreement
1a. Did you know a famous animal-rights activist has criticized horseracing because of the dangers involved?
1b. Did you know a famous animal-rights activist have criticized horseracing because of the dangers involved?
Subject-verb agreement
2a. Peer editing academic papers require critical-thinking skills and diplomacy.
2b. Peer editing academic papers requires critical-thinking skills and diplomacy.
Subject-verb agreement
3a. Vitamins that are sold in a health-food store are not regulated by the Food and Drug Administration.
3b. Vitamins that are sold in a health-food store is not regulated by the Food and Drug Administration.
Using regular and irregular verbs
4a. John has become a rather good actor.
4b. John has became a rather good actor