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
_______ I want very much is a new car.
#93897
A
All which
B
All that
C
All what
D
What that
_______ we know, hurricane is _______ to come.
#94948
A
As soon as; possible
B
As long as; probable
C
As far as; likely
D
As well as; perhaps
During the period of recent terrorist activities, people _____ not to touch and unattended bag. 
#95159
A
had always been warned
B
were always being warned
C
are always warning
D
always warned