⑴fifteen           A.17

⑵seventeen       B.15

⑶nineteen        C.18

⑷twelve          D.19

⑸eighteen        E.20

⑹twenty          F.12

—How many rulers?

—Fourteen rulers.

—How many books are there?

—Thirteen books.

⑴What time is it now?        A. Thirteen pens.

⑵Here you are.               B. Yes, it is

⑶Is this your T-shirt?          C. ok.

⑷How many pens are there?   D. Thank you.

⑸Look at the clock, please.     E. It is nine o'clock.

    This is my father's farm(农场).There are fifteen hens and sixteen ducks. There are two dogs and one cat. There are ten cows and twenty pigs. There are thirteen sheep.

⑴It's seven o'clock.   A.

⑵It's four o'clock.     B.

⑶It's six o'clock.       C.

⑷It's three o'clock.     D.

⑸It's two o'clock.       E.