"Agite, molesti servi!" inquit. "Cur nihil facitis? Cur vos ibi sedetis? Cur non strenue laboratis" (ll. 3-4).
This is as good a time as any to introduce anaphora, tricolon, and even tricolon crescens.
Early in Ecce Romani II, the servi in Chapter 32
"in Forum missi sunt et ibi comparaverunt holera, panem, pullos." (l. 3)Asyndeton, anyone?
I don't dwell on these items nor do I test them in the lower levels, but it certainly makes the job a bit easier a couple years down the line when the whole list of devices appears for memorization and application.