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year’s, be covered with years’, be covered year’s, cover with years’, be covered with
let invited made suggested
How did you feel about your trip What was your trip like What did you think of your trip What did you like about your trip
are; which are; whose is; whose are; of which
are; which are; whose is; whose are; of which
The success in climbing up the mountain. The environmental pollution of the mountain. The equipment for their trip to the mountain. The risks facing the climbers of the mountain.
To make Everest even cleaner than it was. To tell climbers not to leave waste materials. To take away all the trash they could find there. To collect and treat human waste before the ice melted.
calmed down broke down slowed down put down
Surrounded Being surrounded Having been surrounded Surrounding
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