制备酶标记物的交联剂的反应基团至少应有（） A.5个 B.4个 C.3个 D.2个

完成表格。根据短文，完成表格中所缺信息。（5分）
News l   The famous singer Liu Dehua is going to give a concert in Chengdu next month. This is Liu's first time to visit Chengdu. His fans are very excited about the news. It is said that the price of the ticket will be more than two thousand yuan for each person.
News 2   Scientists have found some caves in the north part of Mogao Grottoes of Dunhuang in Gansu. Now the north part has 248 caves in all. People began to make Mogao Crottoes from the year of 366. Pictures in the caves show what people's lives were like in the past.
News 3   Are girls cleverer than boys? Maybe. In a new study, scientists found that female chimps (黑猩猩)  used sticks two years earlier than male chimps. Female chimps watched their mums look for food. The males climb trees. The same thing also happened in the world of people. Girls learn to write and draw before boys, while boys learn to play with balls before girls.

Name	Main information about the news
News1	Liu Dehua will _____小题1:____ in Chengdu next month. Liu’s fans are very ___小题2:____ and the tickets will be very expensive.
News2	Scientists found__小题3:__ in Mogao Grottoes. From the ___小题4:_____ in the caves, we can know how people lived and worked in the past.
News3	Maybe girls are cleverer than boys, it is the same as the world of ____小题5:____