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補(bǔ)全短文

In order to produce high quality products,the Tasmanian government understands the need for getting high quality irrigation equipment at all times,such as travelling irrigators （灌溉車）,pumps and other irrigation tools,which are the key to the success of the growers. It is also no wonder why irrigation equipment makers and suppliers are making much money in the region. ______

A、They play a key role in meeting the needs of the farmers.

B、Through the years,people there have come up with long-term solutions that mainly focus on developing or improving its various irrigation systems.

C、Travelling irrigators first appeared in the East Han Dynasty in China.

D、Next on the list is drip irrigation and spray irrigation.

【正確答案】A

【答案解析】答案選A.此句與上句間具有輕微的因果關(guān)系，基本解釋也是總結(jié)了上句講到了灌溉設(shè)備的制作方和零售商賺錢的原因和意義。

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