题目

 He was hoping to go abroad; but his parents __________ that they won’t support him unless he can borrow money from the bank. A. were deciding                                         B. have decided C. decided                                              D. will decide 答案：B 他父母决定发生在过去，并对现在造成影响，故用现在完成时。21、如果现在1只羊=2袋大米符合等价交换原则，现在生产羊的社会劳动生产率提高了二倍，生产大米的社会劳动生产率不变，那么，一只羊可以换 A．1袋大米               B．4袋大米             C．3袋大米                D．2/3袋大米