多线程与线程池:半道完型填空

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....But you can still be happy when there are no ______"good"things.
A such B so C such a
选哪个,为什么?

选A such

因为things.所以不能选C such a

so +形容词+主语+动词.

such
这样的
things所以不能用a

such
such + adj + n