新生儿的HbF正常参考值是（）

A.＜1.5%

B.10%～15%

C.20%～25%

D.31%～96%

E.＞95%

Simon is           his English book, but he can’t _______ it.

A．looking for, find

B．finding, look for

C．looking after, look for

D．looking at, find