—Can you work out the problem?

—I can't ________ you explain how to do it.[ ]

A. but for

B. except

C. apart from

D. unless

传染病人的隔离方法有（）。

A.呼吸道隔离

B.消化道隔离

C.接触隔离

D.严密隔离

E.血液体液隔离