i had lots of fun （）in the water last sunday这里为什么填playing不填p

i had lots of fun （）in the water last sunday这里为什么填playing不填p I had lots of fun playing in the water last sunday 请帮忙翻译.另外这 I HAD LOTS OF FUN _____(PLAY) IN THE WWATER LAST SUNDAY We had lots of fun in the zoo last Sunday.改为同义句.We had _ _ti 简明扼要就可）1.Playing in the water ______ lots of fun.A.is B.are Playing in the water lots of fun on a hot summer day.(A)is ( Playing in the water __ lots of fun on a hot summer day. i think (playing)is (不填）great fun we had fun playing in the water同义句转换 We had great fun playing in the water.的中文翻译 They had fun playing in the water(改为同义句) We had great fun playing in the water.