1. Lionel ______ researched on planets to deepen his interest in the solar system.

2. The concerns parents have for their children's health usually ______ all other concerns.

3. "Since we have a short time for lunch, shall we go to a restaurant in the ______?" Jeanette suggested.

4. There are many ______ guests that are well-respected for their efforts in environmental conservation present.

5. The group was quick to ______ with a solution to tackle the problem.