第四讲
17
Developing nations in various parts of the world have amassed $700 billion in debt; at stake, should a significant number of these debts be repudiated, is the solvency of some of the world’s largest multinational banks.
ffice ffice" />
B. should a significant number of these debts be repudiated, are
C. should they repudiate a significant number of these debts, are
D. if there is a repudiation of a significant number of these debts, would be
E. if a significant number of these debts will be repudiated, is
我选的也是A, 知识因为单复数， 和D,E选项更加读不懂的原因， 这句话翻译过来时个什么意思啊， 这是个什么语法句型啊？请指点
15
Since chromosome damage may be used by viral infections, medical X-rays, and exposure to sunlight, it is important that the chromosomes of a population to be tested for chemically induced damage be compared with those of a control population.
一个是to be tested........be compared, 这种句型是正确的么？
B,C,D都用了being, 就更加不对了，
E, that is to be tested for chemically induced damage are to be comparable with.
E里面一句话有两个谓语也不对， 所以我选的是A， 也就是原句， 可是我不觉得A没有问题啊？ 请问， A到底有没有问题呢？ | 
