8.請聽第1段材料,回答第7、8小題. 7.What do they plan to do? A.Stay at home. B.Go out for a walk. C.Go to buy a book. 8.Why don't Tina go with them? A.Because she has to study for the final exam. B.Because she will go to buy a book. C.Because she has to finish reading the book.