(2014年北京市西城区高三5月二模试题)28. It was unusual that such close neighbors ______ not know one another. 
#86401
A
could
B
would
C
must
D
should
推荐题目
"They didn’t take measures in time, otherwise the explosions ____."some experts said.
#87726
A
wouldn’t happen
B
didn’t happen
C
wouldn’t have happened
D
mustn’t have happened
Without your help, I ____the exam last term. 
#89943
A
failed in
B
would have failed
C
wouldn’t pass
D
would fail