I have a lot of plans at this weekend.这句话.at 为什么用错了?谁能说一下.

I have a lot of homework-----(do) I have a lot of toys 疑问句 I have a lot of housework________ I have a lot of (headache) I have a lot of both have a lot of I a of hobbies have a lot 排序 快 I have _____food for lunchA:lot of B:a lot of C:a lot D:a lots of I have learned ________ by making flashcards A.lots of B.lot of C.a lot of D.a lot I have a lot of friends .问a lot of的互换词组 同义句转换:I have a lot of homework today I have a lot of probiems in learning english. have, words, new, a lot of, i, to, write I have a lot of fun talking with you. I have a lot of work to do,变为被动 I really have a lot of time to I have a lot of h____ to do after class. I have a lot of good friends.等于什么