We all think it is Jack as well as his wife that______ for their son’s bad manners in public.
| A．are to blame | B．is to be blamed | C．are to be blamed | D．is to blame |
. _____ the book four times, I finally understood the author's theory.
| A．Reading | B．Having read | C．To read | D．Read |
Mike seldom asks ____ questions in class, but today he raised _____ fairly good one.
| A．/; a | B．the; a | C．/; the | D．/; / |
_____ the news, so far, has been good, there may be days ahead when it is bad.
| A．While | B．When | C．As | D．Since |
. Although ________ after the Civil War, the American blacks still took no important role in the white Americans except as servants and laborers.
| A．no longer being slaves | B．were no longer slaves |
| C．no longer slaves | D．no longer been slaves |
The European market has long been favoring a number of African and Caribbean countries, ________ former colonies of Britain or France.
| A．many of whom | B．many of them | C．many of which | D．and many of them |