英语题（反正我也看不懂,像天书一样）

英语题（反正我也看不懂,像天书一样）
一份请柬 Dad and Mum have gone to work.Nancy is playing in tne garden with her dog Derek.Thepostman comes.He gives Nancy a letter.There is an invitation in the letter:N:let's open it and have a look.D:Wow-wow,Where is it from?To Nancy you are invrted do_______________ On___________________________ In___________________________ From_________________________ 1.my birthday 2.my garden 3.Grandma 4.Saturday at 3:30 Nancy琢磨了半天也没弄清楚这份请柬的意思,你能帮帮她吗?一个都看不懂,那道划横线的题和下面的“1.2.3.4”是选择（好像,反正我有不懂）