Ответ:

  1. I usually have a sandwich for lunch, but today I'm having spaghetti.
  2. I usually watch TV after school, but today I'm doing my homework.
  3. I usually play football on Saturday, but today I'm playing tennis.
  4. I usually get up at seven o'clock, but today I'm getting up at eight o'clock.
  5. I usually have a shower, but today I'm having a bath.