4.)In which sentence does the prepositional phrase act as an adverb?

A.)Last evening, Anne suffered from a headache.
B.)The door to the attic was left open.
C.)Mr.Frank discussed the problem of noise in the annex.
D.)He bought a drink for Mr.Dussel.

Yes, A.

To determine which sentence has a prepositional phrase acting as an adverb, we need to understand the function of a prepositional phrase. A prepositional phrase is a group of words that begins with a preposition (e.g., in, on, at, with) and is followed by a noun or pronoun called the object of the preposition.

In this case, we're looking for a prepositional phrase that acts as an adverb, which means it modifies a verb, adjective, or another adverb. To identify the prepositional phrases, we can analyze each sentence by locating the prepositions and their objects.

A) "Last evening, Anne suffered from a headache."
The preposition in this sentence is "from," and its object is "a headache." However, this prepositional phrase is not acting as an adverb because it does not modify a verb, adjective, or adverb.

B) "The door to the attic was left open."
The preposition in this sentence is "to," and its object is "the attic." This prepositional phrase is acting as an adjective as it describes which door was left open, not as an adverb.

C) "Mr. Frank discussed the problem of noise in the annex."
In this sentence, we have two prepositional phrases. The first one is "of noise," with "noise" being the object of the preposition "of." This prepositional phrase is not acting as an adverb since it modifies the noun "problem." The second prepositional phrase is "in the annex," with "annex" being the object of the preposition "in." This prepositional phrase is acting as an adjective to specify where the problem is discussed, not as an adverb.

D) "He bought a drink for Mr. Dussel."
The preposition in this sentence is "for," and its object is "Mr. Dussel." This prepositional phrase, "for Mr. Dussel," is acting as an adverb because it provides additional information about the purpose of buying the drink. It modifies the verb "bought" to specify who the drink was bought for.

Therefore, the correct answer is D) "He bought a drink for Mr. Dussel," where the prepositional phrase "for Mr. Dussel" acts as an adverb.