【推荐1】用方框中所给词语的适当形式填空。每词限用一次。

prefer,        whether,        in person,        valuable,        hero

1. The doctors and nurses in the COVID-19 pandemic are __________. We should respect them.
2. The book provides us a lot of _________ advice on how to work with others.
3. Some students like looking after animals but I __________ growing vegetables.
4. Tom is not sure _________ he can win the coming speaking competition.
5. The news director showed us around the radio station _________.