enthusiastic       
adjective uk/ɪnˌθjuː.ziˈæs.tɪk/ us/ɪnˌθuː.ziˈæs.tɪk/
B2 热心的;热情的;热衷的
showing enthusiasm
  You don't seem very enthusiastic about the party - don't you want to go tonight? 你好像对这个聚会不怎么热心——你今晚不想去了吗? 
 - More examples
 - Well, you could try to look a little more enthusiastic!
 - They were tired, but not any less enthusiastic on that account.
 - I don't think they liked my idea. At any rate, they weren't very enthusiastic about it.
 - Her proposals met with an enthusiastic response.
 - Critics were uniformly enthusiastic about the production.