I . . . . . . . . a brace on my teeth as a child, but I didn’t like it.

was wearing
am wearing
have worn
wore E. have been wearing

The correct answer is D. wore.

The other options are incorrect because they do not correctly express the time period of the action.

  • Option A, was wearing, is incorrect because it expresses an ongoing action in the past. The sentence does not say that the speaker was wearing braces for a long time, only that they wore them as a child.
  • Option B, am wearing, is incorrect because it expresses an ongoing action in the present. The sentence is about something that happened in the past.
  • Option C, have worn, is incorrect because it expresses a completed action in the past. The sentence does not say that the speaker wore braces for a specific period of time and then stopped wearing them. It simply says that they wore them as a child.
  • Option E, have been wearing, is incorrect because it expresses an ongoing action that began in the past and continues into the present. The sentence does not say that the speaker has been wearing braces for a long time. It simply says that they wore them as a child.

Therefore, the correct answer is D. wore.