A new technique ____ out, the yields (收成) increased by 20% .
#98832
A
having working
B
having been working
C
has worked
D
had been worked
推荐题目
    hardly made Allen pay any attention to correcting his mistakes.
#96897
A
scolding
B
To be scolded
C
Being scolded
D
Having scolded
The old woman found herself ______ when she left the market.
#95846
A
cheating
B
cheated
C
to be cheated
D
to have cheated
She was the first woman ______ to the board.
#94213
A
to be appointed
B
having been appointed
C
appointing
D
to appoint