下列疾病是单克隆免疫球蛋白增高的常见原因，除了（）
A.多发性骨髓瘤
B.类风湿关节炎
C.孤立性骨髓瘤
D.重链病
E.浆细胞白血病
参考答案：B
There is a new problem ________ in the popularity of private cars that road conditions need improving. [ ]
A. involved
B. to involve
C. involving
D. being involved
I like _____ in the autumn when the weather is clear and bright. [ ]
A. this
B. that
C. it
D. one
