—________ will your father come back home?

—In two weeks.[ ]

A. How long

B. How soon

C. How often

D. How far

川木香的主要成分是

A．生物碱

B．挥发油及菊糖

C．挥发油及木香碱

D．挥发油和黄酮

E．生物碱、皂苷和挥发油