第一，解释：辨别两者的差别。
第二，造句：
1.Can you tell the difference between an ape and a monkey?你能区分猿和猴吗 ?
2.It is easy to tell the difference between metal and nonmetal.说明金属与非金属的区别是不难的。
3.I can''t tell the difference between margarine and butter , ie can''t identify them by their tastes.我不出人造黄油和黄油有什麽区别。
4.He is able to tell the difference between them.他能分辨清它们之间的区别。
5.Only the real connoisseur could tell the difference between these two wines.只有真正的内行才能指出这两种酒的区别。
第一，解释：讲笑话。
第二，造句：
1.I can''t tell jokes .我不会讲笑话。
2.Henry seems to have nothing better to do than to tell jokes.除了说笑话Henry好像就没有别的事可干了。
3.She tried to tell jokes in order ease up the atmosphere.她尝试着讲笑话,好让气氛缓和下来。
4.When am upset, they can tell jokes for me.当我不开心的时候, 他们可以给我讲笑话。
5.Let''s tell jokes. Who would like to start the ball rolling all tell the first joke?我们讲笑话 吧. 谁愿意开个头讲第一个笑话。