“May I take your order now?” “We’d like three black _________ and two green _________.”

A．coffee, cups of teas

B．coffees, teas

C．cups of coffee, tea

D．cup of coffees, teas

My sister has worked as an engineer since she_____________back from the 

United States.    [ ]

A. came

B. had come

C. comes

D. has come