空所に当てはまる英文を選びなさい。
1.We have enclosed a letter from _____in your territory.

(A) insatisfied customer (B) dissatisfied customer
(C) an insatisfied customer (D) a dissatisfied customer

空所に当てはまる英文を選びなさい。
2.I got_____concerning that matter.

(A) an information (B) useful informations
(C) a useful piece of information (D) an useful piece of information