When he knocked at the door, my mother was busy ____ supper.
#94849
A
preparing for
B
in preparing
C
to prepare for
D
to prepare
推荐题目
These people ____ in the city but now they ____ in the country and like it very much.
#93630
A
were used to live ; used to live
B
used to live ; are used to living
C
used to living ; used to live
D
were used to living ; are used to live
We must stop pollution _____ longer. 
#94786
A
living
B
from living
C
to live
D
live
A newcomer can find that a new environment is difficult to ______.
#92144
A
deal with.
B
be dealt with.
C
dealing with.
D
being dealt with.