患儿，男，3岁。体检发现颅骨软化、鸡胸并伴有X形腿。血钙2.1mmol/L，血磷1.6mmol/L。该患儿处于
A. 维生素D缺乏性佝偻病初期
B. 维生素D缺乏性佝偻病激期
C. 骨软化期
D. 维生素D缺乏性佝偻病恢复期
E. 维生素D缺乏性佝偻病后遗症期
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---What’s in Mrs. Smith’s living room? ---_______ a television in the living room.
A. It is
B. There
C. There is
D. It
---Are his shoes dirty or clean? ---______
A. Yes,, they are.
B. No, they aren't.
C. They are clean.
D. They are clean or dirty.
There are _____ books on the stereo.
A. any
B. some
C. an
D. a
---______ in that box? ---There are some knives in the box.
A. What
B. What's
C. Where
D. Where's
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