woods-couple-dollars森林、伙伴和美金是单数还是复数形式怎么判断

•30分钟精炼21语法填空4woods讲解拓展•1.Woods_____(be)lovely,darkanddeep.•news,statistics•maths,politics,physics•means•2.dollars,days•Twothousanddollars____(be)alotodmoney.•Tendays_____(be)short.•3.couple•Thecouple_____(have)nochildren.•They_____(be)anoldcouple.