It is said that about ______ of the books and magazines in the world ______ in English.[ ]

A. four-fifths;are written

B. fourth fives;are written

C. four fifth;were written

D. fourth fifths; were written

现代药房管理的核心是保证用药的

A．安全

B．有效

C．经济

D．及时

E．合理