is that your book?( ) a.that isn't b.

is that your book?( ) a.that isn't b.
is that your book?( )
a.that isn't
b.yes,it is
c.it isn't
d.no,it is
( ).is this your ruler?
a.excuse me
b.sorry
c.i'm sorry
d.hello
a:your watch is very nice.
b:( ).
a.no.it isn't
b.yes
c.thank you
d.sorry
is that ( )english dictionary?
no,it 's( ) chinese one.
a.a,a
b.an,an
c.a,an
d.an,a