问题
选择题
---- Where _______ the guidebook? I can’t see it anywhere.
---- I _______ it right here, but now it’s gone.
A．did you put; have put
B．had you put; have put
C．have you put; put
D．were you putting; put
答案
答案：C
前一空用现在完成时，表示动作已经做，后一空用一般过去时，表示刚刚发生的动作。