do a lot of grammer exersices中为什么exercise要加s是 grammar

do a lot of grammer exersices中为什么exercise要加s是 grammar When i finish this grammar book,______.A.I know a lot of grammar.B.I'll know a lot of grammer.选哪个?为什么? I have a lot of homework-----(do) do a lot of training是什么意思 do a lot of thinking是什么意思 do a lot of research on eat,of,sweets,a,lot,not,do,(.) She has_____homework to do.A a lot B a lot of C many D lot of why do l have a lot of homework?why? Have you to do a lot of housework?(改错) Lily_____(have)a lot of homework to do I have a lot of work to do,变为被动 I have a lot of h____ to do after class. Have you to do a lot of housework?找错 there are a lot of things to do同义句? Do you get to meet a lot of people? Robots can do a lot of ____(danger) work. i do a lot of traveling in my work