Question

decide whether each sentence is punctuated correctly. use the drop - down menus to choose which revisions, if any, are necessary. when you go to the supermarket, please buy eggs, milk, pears, and carrots. i plan to go skiing with my sisters, charles and boris. mariana hopes to study chemistry geometry, and italian.

Explanation:

1. The first sentence "When you go to the supermarket, please buy eggs, milk, pears, and carrots." is punctuated correctly. The comma after the introductory clause "When you go to the supermarket" is used properly, and commas are correctly separating items in the list.
2. The second sentence "I plan to go skiing with my sisters, Charles and Boris." is incorrect. Since "Charles and Boris" are not sisters, it should be "I plan to go skiing with my sisters, and Charles and Boris." to separate the two - different groups.
3. The third sentence "Mariana hopes to study chemistry geometry, and Italian." is incorrect. Commas should separate the items in the list, so it should be "Mariana hopes to study chemistry, geometry, and Italian."

Answer:

1. Correct
2. Incorrect; change to "I plan to go skiing with my sisters, and Charles and Boris."
3. Incorrect; change to "Mariana hopes to study chemistry, geometry, and Italian."