Not until then ________ how important the brakes were.
#79532
A
I realized
B
do I realized
C
did I realize
D
I did realize
推荐题目
Though __________， he still earned a lot of money to support his family.
#79520
A
no employment
B
not employed
C
was not employed
D
he not employed
Many provinces have been hit with smog. If _______ unsolved, the problem may lead to more serious results.
#80140
A
having left
B
to leave
C
left
D
leaving
Only when I put myself in their position ________ they were more miserable than me.
#80116
A
I had known
B
had I known
C
I knew
D
did I know
On the small island，which is at the entrance to New York Harbor, ．
#79615
A
the Statue of Liberty stands
B
stands the Statlle of Liberty
C
does the Statue of Liberty stand
D
does stand the Statue of Liberty
一How can we reduce C02 in our home?一It’s easy．________ off your TV or computers when you’re not usingthem and you’ll greatly reduce it．
#81996
A
Turn
B
To turn
C
Turning
D
Turned