单项选择题
A.我们准备让步,同意给你们一个合理的价格。 B.我们讨论一下,之后给你一个合理的答复。 C.我们愿意做出让步,给贵方以合理的折扣。 D.我们准备让步,给你们很好的折扣。
A.did the Sphinx begin to be damaged B.did the experts take steps to protect it C.did the polluted air begin to damage it D.did the Sphinx begin to draw people's attention
A.has fallen down B.is made of limestone C.has been well protected over 4,600 years D.is in too poor a condition to be protected