整体是在叙述过去的事情，但其中某句话是描述一般事实，这时该用什么时态？ 比如，叙述过去一次逛公园的经历： Five days ago, I went to the park with Alice. It was a nice day. Alice phoned me and invited me to go to the park for a walk. Alice [was/is] a good friend of mine. She [was/is] a beautiful girl. How could I refuse such an invitation from a beauty? So I accepted it immediately. Alice这块都是一般事实，一直存在着的事实，并非只存在于“逛公园的时候”。该用一般现在时还是一般过去时呢？