17. ________ several hypotheses have been made for the changing of the climate in the area, no conclusive evidence supports any of them.
举一反三
- —Have you been（）any of your friends from college—No, I have been out of touch with them for several years. A: in contact with B: satisfied with C: touch with D: connect with
- It’s a shame _________ able to give them any advice. A: not to have been B: to have not been C: to have been not D: to not have been
- For journalists to be credible, they must double-check the facts they report and make sure the evidence supports them. That is all that is required.
- “ If what is to be spoken be previously determined, there will be no stumbling. If affairs be previously determined, there will be no difficulty with them. If one's actions have been previously determined, there will be no sorrow in connection with them. If principles of conduct have been previously determined, the practice of them will be inexhaustible. ”
- We should admit that old people have some _____ habits that have been with them for many years. And usually they are not ready to get rid of them.