More bison were killed．The bison population is thought ______ from 60 million to just a few hundred between 1850 and 1910.
#96722
A
to have fallen
B
having fallen
C
to fall
D
falling
推荐题目
______ many times, my elderly mother still can’t remember how to light the gas.
#91689
A
Had told
B
Having told
C
Having been told
D
Being told
I can’t have you ___________ to your mother in a rude manner.
#88912
A
to speak
B
speaking
C
speak
D
spoken
Mary escaped __________ for her coming late for school this morning.
#89930
A
from punishment
B
punishing
C
being punished
D
from punishing
While ______ out of the window, I saw my father growing some vegetables in the garden.
#96698
A
look
B
looks
C
looking
D
looked
Though ___ to stop to take a rest, the workers went on working till sunset.
#97005
A
told
B
being told
C
telling
D
having told