With his attention _________ on his book, he didn’t notice someone entering his room.
#90427
A
concentrating
B
concentrated
C
to concentrate
D
concentrates
推荐题目
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
The interview he paid little attention to _____ him the chance to work in this company.
#96324
A
being cost
B
be cost
C
costing
D
cost
My boss command me ____ the same mistake again or I would be fired.
#90445
A
not to make
B
not make
C
don’t make
D
to not make
The government cannot be seen to ______ to terrorists’ ______ .
#97072
A
give up; requests
B
give out; recommendations
C
give in; demands
D
give over; suggestions