we often do ( )in science classes.A,experiments B,a experiment C,experimenting

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we often do ( )in science classes.A,experiments B,a experiment C,experimenting
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we often do ( )in science classes.A,experiments B,a experiment C,experimenting
we often do ( )in science classes.A,experiments B,a experiment C,experimenting

we often do ( )in science classes.A,experiments B,a experiment C,experimenting
A
做实验
注:B中的的A 应该是an ; c 分词不能作宾语.
加油!不明白再问!

A. experiments 实验是可数的。