--How did ____ feel to run 3000 meters at the sports meet?

--Terrible! Especially when I saw I was left so far _____ by the others.

A．that; alone

B．it; alone

C．that; behind

D．it; behind

水源工程一般是指为从水源取水进行滴灌而修建的拦水、引水、蓄水、提水和沉淀工程，以及相应的输配电工程。