The sentence should have a comma after 'now' and should not use Title Case for 'right now.' Additionally, there are punctuation corrections needed for apostrophe use and verb agreement in the review questions provided.
The sentence provided does contain punctuation errors that need to be corrected. The sentence needs a comma after the word 'now' to separate introductory elements. Additionally, 'right now' should not be written in Title Case unless it's at the beginning of a sentence, which it's not in this context. Here is the corrected sentence:
Gilderoy Lockhart is always thinking about strange things. Right now, for example, he is contemplating whether 2+2 can equal 5.
In regards to the review questions involving punctuation and grammar:
- Jack's and Jill's hill is nothing more than a mound of dirt on the southwest corner of Farmer John's land.
- One's labor is proportional to one's wealth.
- George shouldn't say that he'll be in the library when he obviously won't.
- I'll be back.
- Who'll referee those kids' soccer game if not for your brother?
- With regards to the other review questions involving verb agreement and spelling correction, we have:
- There is fewer criminals on the street since the law was passed.
- That may be, but there is no evidence that it's making us any safer.
- Mathematics is the fundamental language of physics.
Jerry, who runs around all weekend trying to find great deals at big-box stores, sometimes loses sight of what's really important.
The probable question may be:
What corrections were made to the sentence about Gilderoy Lockhart, and what were the specific issues with punctuation, capitalization, and grammar in the given review questions?