We invited her to dinner but she didn't bother to ________.
A．turn on B．turn away
C．turn up D．turn out
________ the words，the daughter understood what her mother was trying to tell her.
A．To be heard B．To hear
C．Heard D．Hearing
This vase ________ perfect but for a few small holes in its base.
A．would have been B．should have been
C．shall be D．would be
Tom sacrificed his personal life ________ he could get ahead in his career.
A．in case B．as if
C．so that D．only if
There is still a strong argument ________ mobile phones are a particular risk to children.
A．when B．which
C．that D．what
Students ________ remain in their seats until all the papers have been collected.
A．shall B．might
C．could D．will
