The key ___ on the table when I leave.
问题描述：
The key ___ on the table when I leave.
A.was left B.will be left C.is left D.has been left
___ these desks be needed?
A.Will B.Are C.Has D.Do
Why ___ to talk about it yesterday?
A.didn't a meeting hold B.wasn't a meeting held C.wasn't held a meeting D.a meeting wasn't held
答
C. is left
A. Will
B. wasn't a meeting held第二个为什么选A？陈述句是these desks will be needed，这样你就该清楚了吧。。。嗯，明白了，那第三个为什么选B呢a meeting wasn'theld 是陈述形式，变成疑问句时wasn't 提前，其他照常。