who which when what

Choose the letter A, B, C or D to complete the passage below

Hoi An Town is an ________ (6) well-preserved example of a Southeast Asian trading port dating from the 15th to the 19th century. ___________ (7) buildings and its street plan reflect the influences, both indigenous and foreign, that have combined to produce this unique heritage site. Hoi An has no airport, and no train station ___________ (8). The only way to get there is by road. You can hire a taxi from the neighboring city of Da Nang, ___________ (9) does have an airport with daily flights from Hanoi, Ho Chi Minh City and other large Vietnamese cities. There’s also a train station in Da Nang, and bus services are plentiful. We have a wide selection of hotels for you to choose from in both Cua Dai Beach ___________ (10) Hoi An City, whatever suits your pocket and style.

Question 9: