既能补血，又不致滑肠（）

A．土炒当归

B．醋当归

C．酒当归

D．当归炭

E．全当归

To have a computer without being connected to the Web is like having an old radio when everybody else has a color TV. That helps explain ______ businesses are setting up Net sites even though profits are nowhere to see.

A．reasons

B．the reason for

C．why

D．why that