金太阳河南2021~2022年度下学年创新发展联盟高二年级联考三(22-02-348B)英语试题(无听)

3o.What does the underlined word“ascertain'"in paragraph3 probably mean?

A.Doubt.

B.Criticize.

C.Determine.

D.Deny.

31.What is the significance of“Niche partitioning'"?

A.Saving enough food resources.

B.Contrib