When workers are organized in trade unions, employers find it hard to lay them ________.
D
暂无解析
Becareful,_______you'llfalldown.
________somanypeopleintheUnitedStatesbeenoutofworkastoday.
I'm______tograduateinthenexthalfoftheyear.
Itisusefultoscience_______theearthasanobjectinspace.
Let'sdrink_______Dicks'successinbusiness.
