Sure! Here’s a completed version of the passage:

Yesterday, our class (1) **explored** the vibrant rainforest on (2) **an eco-tour**. Before the trip, we had studied the names of plants and animals. However, when I was asked about a beautiful butterfly, my mind (3) **went blank**! Luckily, our guide patiently helped me recall it. Surrounded by the green plants and trees, I took (4) **a deep breath** of fresh air and felt my stress melt away. Exploring the rainforest not only filled my mind with knowledge but also provided a welcome escape (5) **from** daily stress, allowing me to feel (6) **relaxed and refreshed**.