在工程进度款的计算中,其单价的计算主要根据()的工程价格的计算方法决定。
A.设计概算
B.投标报价
C.发包人和承包人事先约定
D.发包人监埋工程师事先约定
参考答案:C
在9、8中间添______个0,这个数才是九千万零八.
— My car has broken down. Could you please give me a ride tomorrow?
— I'm sorry I _____. I'm leaving for London tonight. [ ]
A. can't
B. mustn't
C. couldn't
D. shouldn't