____ finishing his homework, he went to play basketball.
| A．In | B．Upon | C．At | D．With |
_____ 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 |
Sunset at Mount Huangshan is a beautiful scene, I’ll never forget.
| A．one | B．it | C．what | D．that |
--Mary's gone out with ________ his name--you know, the boy with the red car?
-- Oh, it's Jack.
| A．that's | B．it's | C．what's | D．who's |