问题描述：
请分辨下列复合句含有哪种从句
1.he went into the cave although it was very dark.
2.that the earth is round is known to us all.
3.A plane is a machine that can fly.
4.Put it where you found it.
5.If it snows tomorrow,we will build a snowman.
6.I'll show you in order that you will see how it's done.
7.Because I didn't know the way,Iasked a policeman.
1.he went into the cave although it was very dark.
2.that the earth is round is known to us all.
3.A plane is a machine that can fly.
4.Put it where you found it.
5.If it snows tomorrow,we will build a snowman.
6.I'll show you in order that you will see how it's done.
7.Because I didn't know the way,Iasked a policeman.
问题解答：
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