2 . 今年，你所在的城市开展垃圾分类活动，学校广泛宣传，你和同学都积极参与到此项活动中。请你为班级英语角写一篇短文，介绍此项活动，内容包括:
1.基本情况；
2.具体做法；
3.个人感受。
注意:
1.词数100左右；
2.题目以为你写好。
题目:Waste Classification
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3 . 假定你是李华，受学生会委托，围绕“垃圾分类，保护环境”这一主题，为学校宣传栏“英语天地”写一封倡议书，内容包括:
1. 倡议的原因和目的；2. 倡议的具体内容；3. 发出倡议。
注意:1.写作词数应为80左右；
2.可以适当增加细节，以使全文连贯。
参考词汇:垃圾分类garbage sorting；区分differentiate
Dear friends，
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4 . With people wearing face masks to protect themselves from being infected with the novel coronavirus, a concern now is how they are dealing with their used masks. As used face masks may carry the coronavirus, they shouldn't be carelessly thrown away as waste. Since the virus can survive for one or two days in wet conditions, the used masks may become a new source of infection.

Given that the garbage sorting has recently been carried out in only a few cities, mixed waste commonly exists. The mixture of polluted masks and recyclable waste may cause a possible danger to rubbish collectors when they put hands in the garbage cans to collect recyclable items. What's worse, if someone just throws a used mask on the street, someone might pick it up, or try to collect it to sell second-hand.

With the spread of the novel coronavirus, there has obviously been a high demand for protective equipment such as face masks among ordinary people, with the resulting generation of a huge quantity of what may be considered medical waste. Thus, the problem is how to deal with this mass of medical waste, particularly the used face masks outside of hospitals. Communities should have special trash cans around to collect used masks. If these are not provided, people should put the waste into plastic bags before casting them aside, so they are not exposed to the air.

As the main risk of medical waste is infectivity, disinfection, whether by steam, chemicals or microwave, is very important. According to regulations, only licensed companies should collect, transport and do the final management of medical waste. For example, medical waste must be collected in special containers,and be transported in special vehicles by qualified people.

1. What problem is described in paragraph 1?

A．Used masks may cause infection.	B．Used masks are difficult to recycle.
C．The virus spreads quickly in wet conditions.	D．The novel coronavirus infection is worsening.

2. What is paragraph 2 mainly talking about?

A．The causes of sorting garbage.	B．The ways of recycling used masks.
C．The harm of using second-hand masks.	D．The risk of handling used masks improperly.

3. What do the underlined words "casting them aside" in paragraph 3 probably mean?

A．Destroying rubbish.

B．Throwing waste.

C．Marking rubbish.

D．Reusing waste.

4. What can we infer from the last paragraph?

A．It costs a lot to collect and transport medical waste.

B．The hospital infection is mainly from medical waste.

C．The rules of dealing with medical waste are very strict.

D．License companies should be responsible for infection.