More than 60% of children with two sleepwalking parents go on to sleepwalk, a new study says. 

Sleepwalking often begins in childhood and ends when people grow up. But sleepwalking may also go on when people grow up. It can also start later in life. 

In the new study, Dr. Jacques looked at about 2,000 kids in Canada from 1997 to 1998.

He found that 56% of the children (aged 1.5 to 13 years) had sleep terrors. Younger children were more likely to have sleep terrors. And 29% of kids aged 2.5 to 13 years had sleepwalking. 

About 47% of those with one sleepwalking parent went on to be sleepwalkers. And if two parents sleepwalked around at night while sleeping, the odds were about 60% that their child would also sleepwalk.

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1.Sleepwalking often happens_____.

A in men.

B in women.

C in old people.

D in childhood.

解析：选D。D细节理解题。根据第2段第1句Sleepwalking often begins in childhood可知，故选D。

2.How many kids did Dr. Jacques looked at in one year?

A Over 2,000.

B Over 3,000.

C About 2,000.

D About 3,000.

解析：选C。C细节理解题。根据第3段Dr. Jacques looked at about 2,000 kids in Canada from 1997 to 1998.可知，故选C。

3.When a kid is two-year-old, he is likely to have____.

A sleep terrors.

B sleepwalking.

C sleepwalking parents.

D one sleepwalking parent.

解析：选A。A内容理解题。根据第4段He found that 56% of the children (aged 1.5 to 13 years) had sleep terrors. Younger children were more likely to have sleep terrors.可知，故选A。

4.What is the odds of the child to sleepwalk when both parents are sleepwalkers?

A 56%.

B 29%.

C 60%.

D 47%.

解析：选C。C内容理解题。根据最后一句And if two parents sleepwalked around at night while sleeping, the odds were about 60% that their child would also sleepwalk.可知，故选C

5.Who is more likely to be a sleepwalker?

A Jay with his mother often sleepwalks at night.

B Tom with his father often sleepwalks at night.

C Lee with his parents never sleepwalks at night.

D John with both his parents sleepwalk at night.

解析：选D。D 判断推理题。根据课文内容可知若父母双方都患梦游症，则孩子患梦游症的几率高达60%，故选D。