When Jennifer stepped in quietly, her mother, ____ on the bed, was sleeping sound.
#93308
A
laying
B
lain
C
laid
D
lying
推荐题目
The old man ____ down by a truck is being saved now. 
#90780
A
knocking
B
to knock
C
knocked
D
being knocked
I got to the office earlier that day, ______ the 7:30 train from Paddington.
#90914
A
caught
B
to have caught
C
to catch
D
having caught