Is this a clock? Yes,it is.
Is this a pencil-box? No, it isn't.
Is this a cake?Yes,it is.
Is that a bag?No,it isn't.
a pear a cake a banana
an apple an orange an egg
a bikea busa planea cara jeep
Japanese Chinese
a Chinese bus
a Japanese car
an English bike
a or an
A:What's that in English? B:It's ( ) car.
A:Is it ( ) English car? B:No,it isn't.It's a Japanese car.
A:Is that ( ) apple? B:No,it isn't.A:What's it? B:It's a pear.
What is this/that/it?
Is this/that an eggs?
Yes,it is.(No,it isn't.)