6. A) He's been to Seattle many times.
B) He has chaired a lot of conferences.
C) He has a high position in his company.
D) He lived in Seattle for many years.（A）

7. A) Teacher and student.
B) Doctor and patient.
C) Manager and office worker.
D) Travel agent and customer.（C）

8. A) She knows the guy who will give the lecture.
B) She thinks the lecture might be informative.
C) She wants to add something to her lecture.
D) She'll finished her report this weekend.（B）

9. A) An art museum.
B) A beautiful park.
C) A college campus.
D) An architectural exhibition.（C）

10. A) The houses for sale are of poor quality.
B) The houses are too expensive for the couple to buy.
C) The housing developers provide free trips for potential buyers.
D) The man is unwilling to take a look at the houses for sale.（D）