________ with her work, she didn't even notice the heavy snowfall outside the window.
#89537
A
Occupying 
B
To be occupied
C
Having occupied 
D
Occupied
推荐题目
Listen, Do you hear someone _____for help?
#92391
A
calling
B
call
C
to call
D
called
Would you mind _________ me some cents? I would like ________ a phone call.
#96974
A
lending, to make
B
borrowing, to make
C
to lend, to make
D
borrow, making
Mr. Smiths was busy writing a story, only ______ once in a while to smoke a cigarette.
#88541
A
to stop
B
to have stopped
C
being stopped
D
stopping
_______ in thought, he almost ran into the car in front of him. 
#98610
A
Losing
B
Having lost
C
Lost
D
To lost