Only in this way ____to make an improvement in the operating system.
#79589
A
you can hope
B
you did hope
C
can you hope
D
did you hope
推荐题目
Not until all the fish died in the river ______ how serious the pollution was.
#83100
A
the villagers did realize
B
the villagers realized
C
did the villagers realize
D
didn’t the villagers realize
What would have happened, as far as the river bank?
#81563
A
Bob had walked farther
B
if Bob should walk farther
C
if Bob walked farther
D
had Bob walked farther
--- Can I use the fax on the table, sir? --- In no case _____ to use the fax for personal affairs.
#81711
A
anyone is allowed
B
nobody is allowed
C
is anyone allowed
D
is nobody allowed
Only when she reached her office____ she had left her key at home.
#81566
A
she realizes
B
does she realize
C
she realized
D
did she realize