With a lot of difficult problems ____, the manager felt worried all the time.
#98203
A
settled
B
to be settled
C
settling
D
to settle
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