Choose the correct form of the simple past or past progressive to complete each sentence. 1. The hunter __ what he thought were rabbits, but they glowed in the dark. a) trappin c) were trapping b) was trapping 2. The allens __ life on Earth, but were mostly talking to trees. a) Investigating c) were investigating b) was investigating 3. After ten years, he finally __ the question of whether aliens are green or not. a) was solving c) solved