题目内容：

Now, about half of American children have cellphones(手机). And that has many problems, like questions about etiquette and the phone fees(费用)—about ＄5 a month.

“The best thing parents can do is to educate, educate and educate,” Dr Milteer said, “They also need to make rules. One way is putting a basket out where children put their phones in at home. Then they can’t go into their rooms and call their friends,” she said, “If they need to use, they can use the house’s phone.”

Parents also complain to her about their children texting under their quilts at night. “Don’t worry,” Dr Milteer said, “Let them know there are rules. There comes a time when parents have to be parents.”

We hear that driving and texting are dangerous, but Dr Milteer said that it is dangerous for children to text when they are walking in the streets.

根据短文内容，选择正确答案（10分）

1.How many children may have cellphones in a class with 30 students?

A、About 30.B、About 20.C、About 15.

2.What should their parents do?

A、Educate and make rules.

B、Don’t give their children phones.

C、Give them some money.

3.Where do the children put their phones at home?

A、In his/her bedroom.

B、In their parents’room.

C、In the basket.

4.What do some children do at night according to some parents?

A、Call their classmates.

B、Text under their quilts.

C、Study under their quilts.

5.What does the underlined sentence mean?

A、这是父母必须有父母的时候了。

B、这是父母要拿出自己的权威的时候了。

C、这是父母拥有的一段时光。