--- Have you solved your problem?---I've kept on thinking about that matter ______, but I have no idea yet now. 
#43153
A
at times
B
some time
C
at a time
D
all the time
推荐题目
It’s _________ hard problem for the twins that ________ of them can work it out . 
#37180
A
so, neither
B
such a, none
C
so a, neither
D
such a, neither
Look at the beautiful shirt. _______ colour is _______ favourite.
#40222
A
Its; Daniel’s
B
It’s; Daniel
C
It’s; Daniel’s
D
Its; Daniel