是lot of rules还是lots of rules

是lot of rules还是lots of rules We have a lot of rules in our school.___ ___a lot of rules i 是a lot of exercises ,还是lots of exercise?为什么?lots of和a lot of there ( )(be)lots of rules in my school. 什么是rules of thumb? "rules of thumb"是什么意思 They have a lot of rules at their house. lots of food 还是lot of food RULES OF THE ROAD怎么样 Family rules of the Obamas 初中英语作文 rules of class 是What do you think of ourschool rules?还是What do you think ab