Most of the problems ______, he has a tight schedule every day. 
#91575
A
remaining unsettled
B
remained unsettled
C
remaining unsettling
D
remained unsettling
推荐题目
All his time _______research on Chinese history, he has no time for outdoor activities.
#91209
A
devoted to do
B
devoted to doing
C
devoting to doing
D
is devoted to doing
We drove to the airport to meet an expert from Germany, about 50 years old, his hair ________.
#91163
A
was completely grey
B
be completely grey
C
to be completely grey
D
completely grey