骨折临床愈合期一般在骨折后（）
A.3周左右
B.4周左右
C.5周左右
D.6周左右
E.8周左右
参考答案：A
_______ puzzled Li Lei a lot was _______ his best friends didn’t come to school this morning．
A．That; why
B．That; what
C．What; whether
D．What; why
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