---Why do you look so upset?---There are so many troublesome problems ____.
#94721
A
remaining to be settled
B
remained settled
C
remaining to settle
D
remained to be settled
推荐题目
 The composers soon began to write musical dramas about Bible stories ______ in church.
#98725
A
to perform
B
performing
C
to be performed
D
be performed
Please tell me the way you thought of ________ the garden.
#95541
A
take care of
B
to take care of
C
taking care of
D
to take care
________ many times, he still repeated the same mistake.
#89945
A
Having been told
B
Having told
C
Telling
D
Told
We hope your suggestion will contribute __________ the problem. 
#88240
A
to solving
B
to solve
C
of solving
D
solved