25. ---You ought to have educated your son not to have eaten so much junk food, such as fried chicken, roasted mutton, smoked bacon and the like.
---I _______ .
| A．did but he didn’t listen | B．ought to and he wouldn’t listen |
| C．ought to have; but he didn’t listen | D．should have but he hadn’t listened |
The genetic engineering, ______ progress has been very rapid recently, is perhaps the most important of all the sciences．
| A．to which | B．with which | C．in which | D．for |
I don't think the experiment is _____ failure. At least we have got _____ experience for our
future work on _____ nature.
| A．/; /; / | B．a; /; the | C．a; /; / | D．/; the; / |
---- My neighbor plays loud music late at night．
---- ________．You really should talk to him about it．
| A．You’ve got it right | B．It’s a good point |
| C．This is tricky | D．That’s annoying． |
The meeting ________ tomorrow is very important．
| A．held | B．to hold | C．to take place | D．taken place |
Although this ______ sound like a simple task, great care is needed．
| A．must | B．may | C．should | D．shall |