Can I have some milk before I . . . . . . . . to bed?

The correct answer is: A. go

The other options are incorrect because they do not make sense in the context of the sentence.

• Option B, “am going,” is incorrect because it is in the present progressive tense, which is not typically used to talk about future events.
• Option C, “shall go,” is incorrect because it is in the future tense, which is not typically used to talk about something that is happening immediately.
• Option D, “went,” is incorrect because it is in the past tense, which is not typically used to talk about something that is happening in the present.

The sentence “Can I have some milk before I go to bed?” is asking for permission to have some milk before going to bed. The most likely answer is “yes,” so the correct answer is “go.”