1. We missed our train but, ______, made it to school on time.

2. Due to pollution, the air quality is rapidly ______ in our country.

3. Unable to contain her excitement, she ______ her favourite song spontaneously.

4. Peter recognised the robber immediately as he had a ______ scar on his left arm.

5. Determined to make the event a success, he has ______ all his energy and time on it the past month.