The astronauts marveled at _________ earth looked like a blue marble from space.
2
writingWhich choice completes the text so that it conforms to the conventions of Standard English?
A
how;
B
how,
C
how-
D
how
Correct Answer: D
Choice D is the best answer. No punctuation is needed between the preposition "at" and its object clause "how earth looked..."
Choice A is incorrect because a semicolon breaks the phrase. Choice B is incorrect because a comma breaks the phrase. Choice C is incorrect because a dash breaks the phrase.