He is so busy with the research he has no time left for any other activity.
A．which B．that C．why D．because
Now that smoking great harm to you and people around you, you might as well .
A．does; give it up B．does; give it in
C．makes; give it up D．makes; give it in
Rock’n’roll was Black music that broke through to white culture when whites played the Blacks’ songs _______ the same style.
A．with B．on C．in D．by
It was not until dark he found that it was the correct way to solve the problem.
A．that B．what C．which D．when
The 11th China International Consumer Goods Fair could not have succeeded the volunteers.
A．with B．because of C．as a result of D．without
She pretended TV when her mother came in.
A．not to be watching B．not watching
C．to not watch D．having not watched
