—— What can I do for you?

——I’d like to buy a gift for my mother’s birthday, one at _________ proper price but of ___________ use and it’d better be __________ surprise.

A．the; /; a

B．the; a ; /

C．a; the; /

D．a; / ; a

下列有关肿瘤的实验室检查叙述错误的是（）

A.CEA在结肠癌、胃癌、肺癌均可升高

B.肝癌及恶性畸胎瘤者AFP均可升高

C.肝癌、骨肉瘤时血清AKP均可升高

D.肝癌及恶性淋巴瘤者乳酸脱氢酶降低

E.前列腺癌时酸性磷酸酶升高