Whenworkersareorganizedintradeunions,employersfindithardtolaythem________.
A、offIdon'tknowhowwecanmake________onthetimetableforanymorecourses.
Itisusefultoscience_______theearthasanobjectinspace.
Sorrysir,wedon'thavewineorbeer.Weareonlylicensedtosell_______drinks.
Asyoulikepopmusic,__________Ilikeliterature.
Iwon't________thosechildrenmakinganoiseinmyhouse!