25．A heavy drought is hitting the south－west part of China, ______severe problems for hundreds and thousands of people and cattle to get fresh drinking water.
| A．causing | B．caused | C．to cause | D．having caused |
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25．A heavy drought is hitting the south－west part of China, ______severe problems for hundreds and thousands of people and cattle to get fresh drinking water.
| A．causing | B．caused | C．to cause | D．having caused |
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