Last Sunday I was walking to the Green Lake Park while 1.___

Last Sunday I was walking to the Green Lake Park while 1._____ I met a foreign visitor who seemed to be losing.I tried to help 2._____ him but I found we had troubles in understanding each 3._____ other because my poor English .Just at that moment ,a 4._____ young lady came to help .She spoke very good English.5._____ The foreigner was unable to find the way with her help,6._____ and I learned some English ,either.Before the foreigner 7._____ left ,he said he was thankful for their kindness .It was 8._____ at that time that I decide to work harder ai English.9._____ The experience has been made me realize that English is really useful .10.______