问题

They multiplied and filled the oceans and seas with oxygen, _____ encouraged the later development of early shellfish and all sorts of fish

A:that
B:where
C:when
D:which

正确答案是：

同类题型

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36 ______ has helped to save the drowninggirl is worth praising

Those eggs ______ , please throw themaway.

The building around the corner caught fire last night.The police are now the matter.[ ]