Put the verbs in brackets in the correct forms:
Ann _________ me her address but I'm afraid I _________ it. (give, lose)

In the given sentence "Ann gave me her address but I'm afraid I lost it," the verbs "gave" and "lost" are in the correct forms.

"Ann gave" is the simple past tense of the verb "give," which correctly indicates an action that happened and was completed in the past.

"I'm afraid I lost" is also in the simple past tense of the verb "lose," which describes an action that occurred and was completed in the past.

The other options do not use the correct verb forms for the given sentence. Option B uses the present perfect tense, Option C uses the simple present tense, and Option D uses the simple past tense for the first verb but the simple future tense for the second verb, which does not match the context of the sentence.

Therefore, the correct answer is "A. gave ... lost."