When workers are organized in trade unions, employers find it hard to lay them ________.
A、offD
暂无解析
Sixtypercentoftelevisionviewerschosehimastheir_______actor.
Theproblem________whenthestudentsrefusedtodotheirhomework.
I'msorryIforgottowrite;Ihadsomuchelse________mymind.
________withthesizeofthewholeearth,thehighestmountainsdonotseemhighatall.
Itisusefultoscience_______theearthasanobjectinspace.
