连词成句，请注意大小写与标点符号。

1. you, did, go, how, there (?)

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2. book, you, did, a, read (?)

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3. what, you, last, did, weekend, do (?)

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4. are, shorter, you, me, than, 4 cm (.)

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属于牙源性真性肿瘤的是（）

A.牙源性钙化囊肿

B.牙瘤

C.单纯性骨囊肿

D.根尖周囊肿

E.鼻牙槽囊肿