Ответ: share, is
Краткое пояснение: Необходимо выбрать слова, подходящие по смыслу.
Логика такая:
- Выбираем слова, которые подходят по смыслу к предложению.
- This week, four experts share with us what they think the key to the world's environment will be in the future. As always, we are to get our readers' reactions. So tell us what you think.
Ответ: share, is