شرکت در آزمون آنلاین
زبان انگلیسی 1
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زبان انگلیسی 1
| آزمون شماره 11803
One of the most important problems we have is the … of the natural homes of animals in forests, lakes and plains. We should do voluntary work to stop it.
The underlined word “that” refers to … .
Based on the passage, it can be understood that … .