There was something wrong with the network, or the e-mail____ earlier.
A．could have been sent B．might be sent
C．need have been sent D．must be sent
I’d rather have a room of my own, however small it is, than _____one with others.
A．share B．sharing C．to have shared D．to share
_______ she was invited to the ball made her very happy.
A．Whether B．Because C．What D．That
Tom was over there. His red clothes stood out clearly _____the snow.
A．behind B．for C．against D．beyond
Mike did the homework _______ it took me.
A．one-third a time B．one-third the time
C．a one-third time D．one-third time
Oh, my God! Is this your room? The furniture here remains _____ with such thick dust!
A．covered B．covering C．to cover D．be covering
