用“2”“3”“4”组成的最大的两位数是[ ]
A．42
B．23
C．43
答案：C
—May I use your car this afternoon?
—Sorry. It broke down this morning again. I’ll have it ________.
A．repairing
B．to repair
C．repaired
D．being repaired
已知点A（a，-2）与点B（-1，b）关于X轴对称，则a+b=______．
