Ответ:

The underlined portions appear to be: a difficult assignment, rarely, happily, tomorrow, beautiful, carefully, a doctor, already, late, never, and on the table. The text after “Mark (12)” is cut off, so that part cannot be answered; please provide the complete sentence.

  1. a difficult assignment — direct object: it answers “What did our teacher give us?”
  2. rarely — adverb of frequency; it modifies “visits.”
  3. happily — adverb of manner; it modifies “played.”
  4. tomorrow — adverbial of time; it tells when we will meet them.
  5. beautiful — adjective; it modifies “flowers.”
  6. carefully — adverb of manner; it modifies “answered.”
  7. a doctor — subject complement (predicative noun) after the linking verb “is.”
  8. already — adverb; it modifies “have finished.”
  9. late — adverb of time; it modifies “arrived.”
  10. never — adverb of frequency; it modifies “have seen.”
  11. on the table — prepositional phrase functioning as a postmodifier of “book.”