问题

Until recently historians assumed that calendars ________ with the advent of agriculture.[ ]

A: came to existence
B: came to exist
C: were existed
D: were existential

正确答案是：

同类题型

Peter likes eggs, bananas, and apples______ breakfast.

Scarcely _____ raining _____ the PLA fighters started on their way again.

Learning English can make _______ to talk with foreigners.

Is this room ________ the meeting

___ from the space, the Great Wall lies in the mountains like a huge dragon.