赞题库-背景图
单项选择题

According to the passage, ______ appeared earlier than ______.

A．apples; oranges
B．oranges; apples
C．oranges; roses
D．algae; wheat
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单项选择题Which of the following is true

A．Algae has existed for more than 430 million years.
B．It is impossible that algae might be the earliest plant on land.
C．Plants get food from animals in the oceans.
D．Evolution began after animals appeared on land.

单项选择题Plants with roots appeared about ______ million years ago.

A．430
B．300
C．330
D．100