A Team Effort

Two blondes were working for the city public works department.

One would dig a hole and the other would follow behind her and

fill the hole in. They worked up one side of the street and down

the other, then moved on to the next street, working furiously all

day without rest, one girl digging a hole, the other girl filling it in

again.

An onlooker was amazed at their hard work, but couldn't understand
what they were doing. So, he asked the hole digger, "I'm impressed

by the effort you two are putting into your work, but I don't get it
-- why do you dig a hole, only to have your partner follow behind and

fill it up again?"

The hole digger wiped her brow and sighed, "Well, I suppose it

probably looks odd because we're normally a three-person team.
But, today the girl who plants the trees called in sick."