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
Children above 12 are able to take part in skiing or other activities _______for them.
#92837
A
designed
B
designing
C
to design
D
having designed
Everyone here will thank the firefighters for the things they have done to prevent fires _______ the environment safer.
#98466
A
make
B
to making
C
to make
D
from making
The thief missed __ and __.
#97402
A
to be caught; to break away
B
being caught; breaking away
C
to be caught; broke away
D
being caught; broke away
I’ve got so many problems _______ today that I’m afraid I won’t have time to have lunch.
#96241
A
to handle
B
handle
C
handling
D
handled
Two years later, her brother disappeared in the war, never ________ again.
#98224
A
hearing from
B
to be heard from
C
to hear from
D
being heard from