A. B. C.  D.

⑴—Where's the dog?  —Look! It's on the chair. {#blank#}1{#/blank#}

⑵—Is this your pencil?   —Yes, it is. {#blank#}2{#/blank#}

⑶—Look at the blackboard.  —Yes, Mr. Ma. {#blank#}3{#/blank#}

⑷—Is the ball under the box?  —No, it isn't. It's on the box. {#blank#}4{#/blank#}

⑴He is a doctor now.{#blank#}1{#/blank#}                 A.

⑵My grandma was a nurse before.{#blank#}2{#/blank#}    B.

⑶My father teaches English.{#blank#}3{#/blank#}          C.

⑷He played Chinese music.{#blank#}4{#/blank#}           D.