问题描述：
in case 后面要接虚拟语气么?
Here's an umbrella in case you ( )it.
A should use B needed C needing D to need
那哪种情况下不用虚拟呢?
Here's an umbrella in case you ( )it.
A should use B needed C needing D to need
那哪种情况下不用虚拟呢?
问题解答：
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