We look forward to … from you very soon.

Step 1: Analyze the question The sentence is "We look forward to ___ from you very soon." We need the correct form of the word that follows "look forward to."

Step 2: Explain the concept In the phrase "look forward to," the word to is a preposition, not part of an infinitive verb. A preposition must be followed by a noun, a pronoun, or a gerund (the -ing form of a verb).

Other common expressions that work the same way:

• look forward to seeing you
• be used to waking up early
• object to paying the fee
• in addition to reading

Step 3: Work through the options

• A. Have heard: a perfect form that cannot follow a preposition. ❌
• B. Hear: the base form, which would only be correct if "to" were an infinitive marker (as in "want to hear"). ❌
• C. Hearing: a gerund, correct after the preposition "to". ✅
• D. Heard: a past form that does not fit here. ❌

Step 4: Answer The complete sentence is: "We look forward to hearing from you very soon."

Exam tip: When you see "look forward to," "be used to," "object to," or "committed to," ask yourself whether "to" is a preposition. If you can put a noun after it (e.g., "look forward to the holidays"), then it is a preposition and the verb must take the -ing form.