Would you please check if I answered these correctly?

Question

a. I just bought CDs by Regina Spektor, John Legend, and Prince.

b. I just bought: CDs by Regina Spektor, John Legend, and Prince.

I picked B because d suffices fine for this.

a. Students, who study hard, should do well on the test.

b. Students who study hard should do well on the test.

I picked B because it didn't need any correction

a. Alex realized the outfielder had dropped the ball.

b. After sliding into second base, Alex realized the outfielder had dropped the ball.

I picked B because the after makes a better sentence.

a. Bob enjoys playing football, and Jim enjoys playing hockey.

b. Bob enjoys playing football and Jim enjoys playing hockey.

I picked B because they are saying pretty much the same thing.

Answer 1

all is correct, except for the first. I would pick A instead of B. I just bought CDs by Regina Spektor, John Legend, and Prince.

Answer 2

<<a. I just bought CDs by Regina Spektor, John Legend, and Prince.

b. I just bought: CDs by Regina Spektor, John Legend, and Prince.

I picked B because d suffices fine for this.>>

I'm not sure what "d" says. "A" is the correct answer here. If the colon had appeared after the word "by," it would be appropriate.

<<a. Students, who study hard, should do well on the test.

b. Students who study hard should do well on the test.

I picked B because it didn't need any correction>>

Right. Letter "a" is wrong.

<<a. Alex realized the outfielder had dropped the ball.

b. After sliding into second base, Alex realized the outfielder had dropped the ball.

I picked B because the after makes a better sentence.>>

Both are fine from a grammar standpoint (unless I am missing something).

<<a. Bob enjoys playing football, and Jim enjoys playing hockey.

b. Bob enjoys playing football and Jim enjoys playing hockey.

I picked B because they are saying pretty much the same thing. >>

The comma is wrong in letter "a." It should not be there. Better "b" is the correct answer.

Answer 3

OOps, I think that was me typing fast. For the first one witht he CD's I thought that it was Ok to separate witht eh colns, but I went back to the wesite that was suggested and it helped me understand a little better. Thank you so much.