Sir Alexander Fleming did not, as legend would have it, look at the mold on a piece of cheese and get the idea for penicillin there and then.上句可改写为:Sir Alexander Fleming did not look at the mol...
If we_______200 years old,we______everything.A.were to be,could change B.had been,changed C.were,would have changed D.should be, changed.这道题,C为什么不对,从句对现在事实的虚拟,主句对过去事...
The companies are working together to create________they hope will be the best means of transport in the 21st century.A.which B.that C.what D.whocreate后面跟的是宾语从句吗, what they hope又是什么...
我看到这句话,In the end, they could feed a black-and- white image of a marked-up face into the computer, and out would pop an automatically rotated portrait that was creepy, pointillistic, and remark...