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
Mary never does any reading in the evening ,______.
#84592
A
so does John
B
John does too
C
John doesn’t too
D
nor does John
Not until he retired from teaching three years ago ________having a holiday abroad.(2012·辽宁，32)
#79680
A
he had considered
B
had he considered
C
he considered
D
did he consider
“ Although ,” the boy said , “ _______ over and over , the maths problem remained confusing to me ” .
#81999
A
explained
B
explain
C
explaining
D
having explained
By the time I saw the angry expression on his face, I ______ exactly what I was having to face. But not for a moment ______ I should quit.
#83180
A
had known; I thought
B
have known; had I thought
C
would know; I would think
D
knew; did I think
Only after Mary read her composition the second time _________ the spelling mistake.
#81405
A
she noticed
B
she has noticed
C
did she notice
D
does she notice