In Cap 39 of LLPSI Orberg has:
In media urbe Dido regina magnificum templum Iunoni aedificabat. Hic primum, nova re oblata, Aeneas salutem sperare ausus est et rebus suis melius confidere: nam reginam opperiens, dum in ingenti templo singula opera lustrat, vidit imagines belli Troiani ordine pictas.
1) Aeneas salutem spearare ausus est. ? Aeneas dared to hope (for) a greeting ? did he hope to greet or be greeted...?
2) '....singula opera lustrat'.
'opera' is plural of opus, operis and it means he looked at / inspected each work
In english 'each' would take a singular noun: he looked at each work.. In Latin singula seems qualify a plural noun.... is this right?