双侧颏孔区骨折可出现
A．前伸不平衡B．基托边缘伸展不够C．系带区基托缓冲不够D．侧方不平衡E．义齿磨光面外形不良
参考答案：C
It’s not easy for Helen to ________ such a little baby. He is always crying.
A. look for B. care for C. ask for
