PSAT Writing and Language Question 138: Answer and Explanation

Question: 138

Which choice most effectively combines the sentences at the underlined portion?

• A. reaction tube since she adds
• B. reaction tube, however, she adds
• C. reaction tube, and adding
• D. reaction tube, she adds

Correct Answer: C

Explanation:

C

Difficulty: Medium

Category: Conciseness

Getting to the Answer: It is important to combine sentences in order to vary sentence structures. But the correct choice should not only be the most effective way to combine the two sentences, it must also be in parallel construction with the first sentence. Watch out for choices that may have incorrect transition words as well. Choice (C) is the correct answer. It joins the sentences concisely and correctly because the verb "adding" is in parallel construction with the earlier verbs "detaching" and "transferring." The subject in both sentences is the same, "she," so it can be dropped when combining the two sentences.