From the words or group of words lettered A to D, choose the word or group of words that best completes each of the following sentences. I look forward to _...

From the words or group of words lettered A to D, choose the word or group of words that best completes each of the following sentences. 

I look forward to _________ from you. 

Answer Details

The correct option is "hearing." In this sentence, "look forward to" is a phrasal verb that means to anticipate or await something eagerly. The preposition "to" requires a gerund (a verb form ending in -ing) to follow it. Therefore, the correct option is "hearing," which is the gerund form of the verb "hear." Option A, "hear," is the base form of the verb, which does not fit the grammatical structure of the sentence. Option C, "be hearing," is the present continuous form of the verb, which is not appropriate in this context. Option D, "have heard," is the present perfect form of the verb, which is not appropriate in this context either.