Jack is cleaning the desk and Maria is d_____ a cat on the b

Jack is cleaning the desk and Maria is d_____ a cat on the b 1.there is a comb and three dolls on the desk .[同义句】 2.Jack there is a ball under the desk. these is a cat on the什么意思? On the wall near the desk there is a picture of a cat是什么意思 The cat is on the desk 对on the desk提问 He is busy cleaning the desk up _______ clock and a pen __________ on the desk.A.An,is B.A,i There is a book and two pens on the desk. Here is a pen and two pencils on the desk. There( )a computer and two books on the desk.A are B is There__________ a ruler and some pencils on the desk. A．is B look there ___ a pencil and some books on the desk A.is B.ar