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Mrs. Smith has three children. They’re Lisa, Ben and Lucy. Lisa is nineteen years old. Ben is two years younger than Lisa. Lucy is the youngest child. She is four years younger than Ben. Mr. Smith is six years older than his wife. Mrs. Smith is 47 years old.
1．—How many children do Mr. Green have?
—________

A．Three.

B．Four.

C．Five.

2．—How old is Ben?
—________

A．Seventeen.

B．Sixteen.

C．fifteen.

3．—How old is Lucy?
—________

A．Ten.

B．Thirteen.

C．Twelve.

4．—How old is Mr. Smith?
—________

A．Fifty.

B．Forty.

C．Fifty-three.

5．—Who is the oldest in the family?
—________

A．Mr. Smith.

B．Mrs. Smith.

C．Ben.