<b>6.</b> <b>Fill in the gaps with the correct
present tenses.</b>

<p></p><p><br>

</p><p align="center"><b>Elephant Researcher</b></p>

<p>&nbsp;</p>

<p style="text-align: left;">Luke Wall <b>1)</b> {#1}
(<b>be</b>) an English leading world
elephant researcher who <b>2)</b> {#2} (<b>observe</b>) and <b>3)</b> {#3} (<b>study</b>) these majestic animals for 20 years.
His main research <b>4) </b>{#4} (<b>involve</b>) elephant intelligence and
social interaction. Wall and his colleagues at Chiang
Mai University
in Thailand
<b>5) </b>{#5} (<b>make</b>) some important discoveries in the field. One of which is the
finding that elephants’ spending time alone <b>6)</b> {#6} (<b>bring</b>) a risk factor to their natural behaviour,
while spending more time in larger social groups, particularly those that <b>7)</b> {#7}
(<b>include</b>) young animals, <b>8)</b> {#8}
(<b>have</b>) a protective effect. Wall
says, “This discovery <b>9) </b>{#9} (<b>show</b>) that the social lives of
elephants <b>10)</b> {#10} (<b>play</b>) a large role
in their behavioral health, and it <b>11)</b>
{#11} (<b>be</b>) very important for those elephants which <b>12)</b> {#12} (<b>live</b>) in captivity.” Based on the
studies, the researcher <b>13)</b> {#13} (<b>actively</b> / <b>fight</b>) for the change in the zoo elephant management programs which
would support the creation of larger, multigenerational elephant social
groupings. However, Wall admits that it <b>14</b>)
{#14} (<b>become</b>) more and more difficult to bring some changes to &nbsp;due to the lack of financing from local
governments and animal welfare organisations. Next week he <b>15)</b> {#15} (<b>fly</b>) to Berlin to take part in The
Zoo and Wildlife Health Conference 2017 and deliver his speech on that issue. </p>

<p style="text-align: left;">&nbsp;</p>

<p style="text-align: left;">Recently
Wall <b>16</b>) {#16} (<b>also</b> /
<b>engage</b>) in an elephant migration
research that his colleagues from London’s
Natural History Museum <b>17</b>) {#17} (<b>carry</b>) out since the beginning of this
century. “It’s so exciting that my fellow friend Victoria Leake <b>18</b>) {#18} (<b>find</b>) dwarf
elephant fossils on a great number of Mediterranean islands,” he cheers, “and
I‘m very happy that I <b>19</b>) {#19} (<b>contribute</b>) to organising her
expeditions.“ Wall is keen on discovering how exactly one species could reach
so many islands. Though he believes that elephants may have walked as sea
levels fell by hundreds of&nbsp; feet during
many ice ages allowing the animals to travel to Sicily and Malta, however it <b>20</b>) {#20}
(<b>not / explain</b>) to him how they appeared
on other islands. Also he <b>21</b>) {#21} (<b>not / refute</b>) the fact that the animals
could have been swept out by the storm or strong currents and have swum to
remote places, yet such events <b>22</b>) {#22} (<b>extremely / be</b>) rare in the Mediterranean. <br></p><p style="text-align: left;"><br></p><div style="text-align: center;"><a href="http://creativecommons.org/licenses/by-nc/4.0/" target="_blank">Content licensed under a&nbsp;Creative Commons Attribution 4.0 International
License (CC BY-NC-4.0)</a><br></div><p></p>