Whether refugees and migrants are waiting in camps or on the move towards the next European country on their journey, one need is constant and that's access to the Internet. In Croatia, where more than 30,000 refugees and migrants have crossed into since Hungary closed its borders last week, one tech start-up is helping them get Wi-Fi access by carrying hotspots on their backs.

“3G network is working ok when we arrived, the rate was even a little over 5 Mbps but was soon stopped working,” the company called Otvorena mreža, or "Project Open Network,” wrote on its Facebook page, adding that the network connection is constantly dropping out.

After collecting donations of 3G USB sticks, batteries, wireless routers and SIM cards, volunteers carried backpacks with mobile Wi-Fi devices to crowded locations such as Tovarnik and Beli Manastir.

 Local mobile operator Hrvatski Telekom has already equipped some refugee centers with free wireless networks and prepaid data cards, while other Croatian operators Vipnet and Tele2 Hrvatska are collecting donations and their employees are volunteering, according to local media reports. However, like in any crowded location, 3G Internet often collapses when too many people try to connect at the same time.

A Project Open Network representative said in a written statement that the company hoped the operators would soon install transmission towers to increase the capacity of the mobile network in the border areas. “Network upgrade is necessary not only for refugees but also for all the people who work there—police, army, civil defense, journalists and everyone else,” the representative added. The tech company works with nodewatcher, an open-source platform that allows everyone who uses it to monitor and contribute to the network. Every user can see the way in which networks are connected and contribute to the network, according to its website.

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1.The underlined word “them” in the first paragraph refer to ______.

A the refugees and migrants

B the internet

C the borders

D the countries

解析：选A。A。词义指代题。根据第一段第二句In Croatia, where more than 30,000 refugees and migrants...可以得知这里的them指代的就是那些难民。

2.What problem did Otvorena mreža face?

A 3G network is working ok.

B The Facebook was out of order.

C The rate was over 5 Mbps.

D The connection broke down often.

解析：选D。D。细节理解题。根据第二段最后一句的...adding that the network connection is constantly dropping out可以得知网络总是断线。

3.What did volunteers get to provide the free wireless networks?

A They donated the 2G USB sticks.

B They carried the mobile Wi-Fi devices.

C They collected some wire routers.

D They set up houses in crowded locations.

解析：选B。B。推理判断题。根据第三段的...volunteers carried backpacks with mobile Wi-Fi devices...可知，志愿者随身带着设备。

4.Why does 3G Internet often collapse?

A Because the company has too few employees.

B Because the number of internet users is large.

C Because the network is not working well.

D Because few people want to be volunteers.

解析：选B。B。细节理解题。根据第四段第二句的However, like in any crowded location, 3G Internet often collapses when too many people try to connect at the same time可知是因特网的用户过多才造成了网络瘫痪。

5.Project Open Network will increase the capacity of the mobile network by _____.

A upgrading network only for refugees

B allowing everyone to use its websites

C setting up new transmission towers

D monitoring the network in a platform

解析：选C。C。推理判断题。根据第五段第一句的...the company hoped the operators would soon install transmission towers to increase the capacity of the mobile network in the border areas可知，该公司通过在边境建立基站来增加网络的容纳能力。