下列化肥中属于钾肥的是（　　）

A．NH₄Cl

B．NH₄HCO₃

C．KCl

D．Ca（H₂PO₄）₂

He spent too much time talking on _______ phone while we were all busy at _______ work.

A．the; /

B．a; /

C．/; /

D．the; the