单项选择题A. The man hasn’t celebrated his birthday for two years.B. The man didn’t have a party for his last birthday.C. The man doesn’t want to have fish on his birthday party.D. It’s been two years since the man last went fishing.

单项选择题A. A substance often served with hot dogs.B. A substance also known as N-nitroso compounds.C. A substance causing cancer in lab animals.D. A substance used to keep hot dogs fresh.

A. A substance often served with hot dogs.
B. A substance also known as N-nitroso compounds.
C. A substance causing cancer in lab animals.
D. A substance used to keep hot dogs fresh.