great help, I could get rid of all the difficulty and succeeded in the end.
#88669
A
Offered
B
Having offered
C
Being supplied
D
Having supplied
推荐题目
To their surprise, the boy’s wound was left ______.
#93780
A
to expose
B
exposed
C
exposing
D
to be exposed
At the computer operation test, one is supposed to stay at his own machine, keep his eyes on his screen, ______ to anyone.
#98207
A
and not to speak
B
but could not speak
C
instead of speaking
D
or rather speak
She wrote a famous book, and so ________ a place in history. 
#98603
A
winning
B
to win
C
to have won
D
won
To my surprise, he turned up in the room without ___.
#97748
A
noticed
B
being noticed
C
noticing
D
to be noticed