A：of
B：from
C：for
D：to
Steve's activity on Sunday
In the past
He spent most of the time 1.
He learnt it from his 2 and he is good at it.
Now
He spends at least 3 hours collecting rubbish.
He would like to protect the beach.
关于“舌尖上的化学”，下列说法不科学的是（ ）
生物在地理环境的形成和发展中起着重要的作用，最根本的原因是（ ）
