Read the sentences and fill in the blanks with proper words (选择正确的的单词填空，使其内容通顺)
1.This lovely doll which sells at a high price is made in________(America/American).   
2.You should try to make________(less/fewer) mistakes in your exam.   
3.Don't drink________(too much/too many) wine. It's bad for your health.   
4.________ (Keep/Keeping) a healthy diet is very important for us.   
5.(How about/Why not) ________take a walk after supper with your parents every day?   
6.Spend more time________(eat/eating) with your family.