She has a __________ daughter. A: six-years-old B: six-year-old C: six year old D: six years old

4. The little boy is _________. A: four years old B: five years old C: six years old D: seven years old

The appropriate age for unilateral cleft lip repair is ( ) A: one to two months old B: three to six months old C: one to two years old D: three to six years old

John and I have been friends for ____. A: primary school B: we were six years old C: many years

The old man is very healthy. I think he will live______. A: to be 100 years old B: 100 years old C: at 100 years old D: in 100 years old

The woman's daughter is ______. A: four years old B: eight years old C: nine years old

Which period is the best period for children to develop their behavior habits? A: 2-5 years old B: 2-6 years old C: 3-6 years old D: 3-5 years old

When the Japanese attacked Singapore, Patsy Li was （） old. A: six weeks B: six months C: six years D: sixteen years

How old is Mrs. Stogdale？ A: 89 years old B: 88 years old

6. How old is the Place Museum? A: A. 600 years old in 2020 B: B. 550 years old in 2020 C: C. 610 years old in 2020 D: D. 700 years old in 2020