四、短文填空
On the side of the road in the Hoh Xil Nature Reserve, you might see a fat wolf. It was
always shaking（摇晃）its tail and rolling on the ground in front of the passing cars for a meal.
1.
However
, the wolf was skin and bones（骨瘦如柴）in the past.
It is said that the wolf was kicked out of the wolf group because of its poor 2.
hunting
(hunt) skills. But that all changed 3.
after/when
a passing driver gave it two pies and posted a video of it online. This quickly made the wolf popular.
After that, the wolf started to turn to passing drivers for snacks. In fact, the snacks are 4.
unhealthy
(healthy) to the wild animals because they have too much sugar and salt. They may 5.
easily
(easy) get sick. It also 6.
increases
(increase) their contact（接触）with humans. They will depend too much on humans instead of 7.
themselves
(they). As 8.
a
result, this can make the wild animals lose their skills to live in nature.
Wolves are part of the food chain in the ecosystem（生态系统）. And 9.
if
people go on to feed them, their habits will change. This will break the balance of the ecosystem. Many people care about wild animals, but 10.
feeding
(feed) sometimes may put wild animals at risk.
