________is no need for you to come if you don’t want to.
| A．It | B．There | C．That | D．This |
Once again he failed to hand in his homework _____ he had been given enough time to do it.
| A．in case | B．as though | C．so that | D．even though |
. _____ 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 |