He made a promise that he would_________us with dinner the next day,but he broke his word.

A．give

B．offer

C．entertain

D．equip

张某受著名歌星甲的委托，代理歌星甲与某剧院签订了一份总酬金30万元的演出合同。因我国法律规定约稿、绘画、演出等具有严格人身性质的行为不得适用代理，故该代理行为无效，( )