I believe these are the correct answers-
1. May my son have some milk, or a glass of juice? b) could he like
2. Are they going to sit the chairs, or will they stand next to the door? d) over
3. Can your teacher speak Chinese, or Should she like to learn? c) it
Or a more clear version-
1. - b) could he like
2. - d) over
3. - c) it
Hope this helps. :)