The stage<span> of launching adult children begins when your first child leaves home and ends with the "</span>empty nest<span>."</span>
It's C, object of the preposition. But we usually put the preposition after the verb from the relative clause: "I met the friend whom I had exchanged many letters with" .
The auther of 'Luckiest time of all' is Lucille Clifton
In H. G. Wells's “The Time Machine”, the
function of the wells is:
<span> They are
ventilators for the underworld.</span>
<span>Its function was mentioned by the Time Traveller
when he had found a small, ape-like creature went down to the well and then
evolved into two different animals which represent the upper and underworlds.
They lived in tunnels ventilated by wells.</span>
