I really don't know _____ I put my wallet．
A．where was it B．it was where that
C．where was it that． D．where it was that
Stephen Hawking has expressed his opinion ?___ humans might one day be able to make spaceships capable of such speeds that time on board would slow down．
A．that B．whom C．which D．what
A truly creative person is able to _____ with fresh ideas from a story told time after time．
A． come on B．come along C．come up D．come out
Not until the next morning _____ how serious the situation was．
A．did she realise B．had she realised
C．she realised D．she had realized
The education reform plan took one year and nine months to draw up, _____ public opinions were called for,
A．to which B．during which
C．from which D．from whom
If Tom _____ my advice, he wouldn't have lost his job．
A．should follow B．had followed
C．followed D．would follow
