I、【met】Mr.Smith at the school gate【by】【chance】
2、【met】Mr.Smith at the school gate【by】【accident】.
3、I 【came】【across】Mr.Smith at the school gate【occasionally】.
无疑后请采纳.
书山有路勤为径,学海无涯苦作舟.
I、【met】Mr.Smith at the school gate【by】【chance】
2、【met】Mr.Smith at the school gate【by】【accident】.
3、I 【came】【across】Mr.Smith at the school gate【occasionally】.
无疑后请采纳.
书山有路勤为径,学海无涯苦作舟.