根据首字母或汉语提示,补全单词.
1.Mike often w___ letters to his friends.
2.The little girl can c____ from 1 to 100.
3.The old man has no daughter or son.He is l____
4.My brother is very s___ .He can learn everything fast.
5.Tom is only 3 years old,but he knows many w____ and he can read now.