单项选择题

One day a police officer managed to get some fresh mushrooms. He was (1) pleased with what he had bought that he offered to (2) the mushrooms with his brother officers. When their breakfast arrived the next day, each officer found some mushrooms on his plate.
"Let the dog (3) a piece first," suggested one (4) officer who was afraid that the mushrooms might be poisonous. The dog seemed to (5) his mushrooms, and the officers then began to eat their meal saying that the mushrooms had a very strange (6) quite pleasant taste.
An hour later, (7) , they were all astonished when the gardener rushed in and said (8) the dog was dead. (9) , the officers jumped into their cars and rushed into the nearest hospital. Pumps (泵) were used and the officers had a very (10) time getting rid (11) the mushrooms that remained in" their stomachs. When they returned to the police station, they sat down and started to (12) the mushroom poisoning Each man explained the (13) that he had felt and they agreed that (14) had grown worse on their (15) to the hospital. The gardener was called to tell the way in (16) the poor dog had died. "Did it (17) much before death" asked one of the officers, (18) very pleased that he had (19) a painful death himself. "No," the gardener looked rather (20) . "It was killed the moment a car hit it.\

A.hard
B.busy
C.exciting
D.unforgettable