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What     56   this ?      57    a backpack . It’s my     58    . What’s that? It’s a       59   . It is     60     computer. Is that a computer, too?      61   .
.It’s a TV set. It’s    62     TV set. I      63      it      64     Sunday afternoon. It is a     65    TV set.

一Is that your book?    一Yes___________.

    A．it  is    B．it   isn’t    C．it’s

What     56   this ?      57    a backpack . It’s my     58    . What’s that? It’s a       59   . It is     60     computer. Is that a computer, too?      61   .

.It’s a TV set. It’s    62     TV set. I      63      it      64     Sunday afternoon. It is a     65    TV set.