A、Advise Tunisian civilians on how to take safety precautions. B、Track down the organization responsible for the terrorist attac

The Tunisian government said Monday that 45 people have been killed after gunmen attacked a town near the border with Libya.
    The Interior and Defense ministries said that(3)the Tunisian government has closed its two border crossings with Libya because of the attack.
    The Tunisian military has sent reinforcements and helicopters to the area, and authorities have been hunting several attackers who were still at large.
    The violence came amid increasing international concern about Islamic State extremists in Libya. Officials of the Tunisian government are especially worried after dozens of tourists were killed in the attacks in Tunisia last year.
    Defense Minister Farhat Horchani said last week that(4)German and American security experts were expected to come to help Tunisia devise a new electronic video supervision system on its border with Libya.
    Tunisia was targeted last year by three attacks that left 70 people dead and were claimed by Islamic State.
Questions 3 and 4 are based on the news report you have just heard.
3. What did the Tunisian government do after the gunmen’s attack?
4. What were German and American security experts expected to do in Tunisia?