—If you like the phone, you'd better buy it.

—But it's too expensive. I can't              it. [ ]

A. afford

B. pay

C. provide

D. spend

女性，28岁，自觉清晨双手指间和掌指关节强直半年，近2个月关节肿胀伴活动障碍。服用非甾体类抗炎药和金制剂等，疗效不满意。

为明确诊断，建议行以下哪项检查（）

A.血、尿常规

B.双手、足X线片

C.抗核抗体谱

D.类风湿因子

E.其余选项均可