This is from The Book of Sun-Dials by Mrs. Alfred Gatty [aka Margaret Scott Gatty], which you can read online at this University of Pennsylvania website.
Sic Vita Fugit
Cur tibi spem vitae longos producis in annos?
Ut momentum horae, sic tua vita fugit.
The vocabulary is keyed to the DCC Latin Vocabulary list. There are two words in this poem that are not on the DCC list:
mōmentum (mōmentī, n.): movement, moment
prōdūcō, prōdūcere: bring forth, produce, stretch out
annus -ī m.: year
cūr: why?
fugiō fugere fūgī fugitum: flee, escape
hōra -ae f.: hour
in: in, on (+ abl.); into, onto (+ acc)
longus -a -um: long, far; longē: far, far off
sīc: in this manner, thus; sīc . . . ut: in the same way as
spēs speī f.: hope
tū tuī tibi tē: you (sing.)
tuus -a -um: your
ut, uti: as (+ indic.); so that, with the result that (+ subj.)
vīta -ae f.: life
