题目内容：

    On January 27, in order to win the new pneumonia Resistance War (抗击新型肺炎战) , the Ministry of Education issued (教育部公布)  a notice on putting off the start time of school in spring 2020. It was said that school should not start before March. The exact start time of school will depend on situations and further notices.

However, many parents are very worried that putting off the start of school may affect (影响) children's studies. If they have such a long winter vacation, children will not learn any knowledge, read books or study at all. They may forget what they have learned before. Staying at home for a long time will make them keep eating, sleeping and playing, which seriously affect their physical and mental health.

In short, the close of school influences learning and develops bad habits, so how should we avoid these problems? Local education departments have also issued a notice, that is, to organize online teaching and create a network platform (平台) , where necessary courses will be shown every day, and online teaching will be given by excellent teachers of the subject, and students can learn at home through computer or mobile network.

It should be said that such a method is very good. It can not only keep students indoors and not worry about the infection (感染) of the disease, but also make them study at home, improve their learning ability, and truly achieve "no suspension of classes". Both the platform itself and the recorded lesson resources are more useful, and are welcomed by parents and teachers.

Of course, except for learning at home, it is also necessary to teach children about health knowledge, especially how to keep away from touching virus and other knowledge popularization; at the same time, it is also necessary for children to do some physical exercises or some games, which is good for physical health at home.

1.Parents worried about putting off the start time of school because _______.

A.children may be infected by virus

B.they don't like the idea of online learning

C.children's study may be affected

D.parents have no time to look after children

2.Except for learning at home, what is also necessary according to the writer?

A.To keep playing online games.

B.To keep touching different people.

C.To do some physical exercises outside.

D.To teach children about health knowledge.

3.The underlined word "suspension" in Paragraph 4 probably means _______ .

A.plan B.stop C.growth D.change

4.Which is TRUE according to the passage?

A.Students would rather go to school.

B.The date of going to school is decided.

C.Online teaching will help students study.

D.Parents believe children can teach themselves.