Zdania 1-6 należy uzupełnić czasownikami z ramki, w czasach Present Perfect, bądź Past Perfect.
1. I have explored caves with my brother for over ten years.
2. John had studied endangered species for years before he was finally able to visit some of their natural habitats.
3. After they had climbed the mountain, they finally reached the glacier.
4. Our planet has experienced climate change for some years now.
5. Before our trip to Vienna, we had flown only a couple of times.
6. A number of rainforests have already disappeared.
Słowniczek pojęć:
(to) explore - badać, odkryć
a cave - jaskinia
endangered species - zagrożone gatunki
a habitat - siedlisko, środowisko
a glacier - lodowiec
a climate change - zmiana klimatu
(to) disappear - znikać
a rainforest - las deszczowy
