—Good evening, Mr. Green. I'm sorry to bother you. But it's the fourth of December today.

—Oh, Mrs. Baxter, _____ rent! I'm sorry it's late. I'll write you _____ check right now.[ ]

A. the; the

B. a; a

C. a; the

D. the; a

枳壳主含

A．木脂素类

B．黄酮类

C．皂苷类

D．三萜类

E．环烯醚萜苷类