下列各句A、B、C、D中有一处错误，请在不改变句子意思的前提下，将正确答案写在题后的横线上。
小题1:It’s kind for you to help me with the housework.
A       B       C        D                                
小题2:It’s too hot. Why not stay at home and watch TV instead ofplay football.
A              B           C  D                
小题3:Although he was very tired, but he still cleaned the classroom before he left.
A           B          C                D    __________
小题4:The naughty boy talked so manythat he couldn’t hear the teacher.
A       B   C      D                              
小题5:There are twenty more trees to be plant. We have to keep on working.
A          B         C            D