I went to ____restaurant last night为什么不用the,而用a

I went to i went to I went to drink some I went to Harbin.翻译 i went to XinJiang翻译 I went to () the Great () I went to the far I went back to canada 是I went to the shop I went to the shop还是I went to shop? I went shopping 还是I went to shopping对? i went to museums or i went to museum 如果是i went to the （）呢? I went to the park.（变现在完成时) I went to the zoo last Sunday. I went to school改为一般疑问句 I went to a library yesterday I went to a toy shop yesterday. I went to school when I___six I went to work( )foot yesterday.