iwasmuchimpressedbygreatchangesandfastpaceoflifeinshanghaiicametovisitthiscityAatthefirsttimeBforthefirsttimeCbythefirsttimeDthefirsttime答案D为什么不选A求详解.

Question

i was much impressed by great changes and fast pace of life in shanghai _i came to visit this city
Aat the first time
Bfor the first time
Cby the first time
Dthe first time
答案D为什么不选A求详解.

Answer 1

the first time 第一次,是名词,在句子中只能做名词的成分.
at the first time 是介词短语,是“在第一次”
句子的意思是,第一次参观这个城市的时候.