______ I admit that all these problems are difficult, I don’t agree that they can’t be solved.
#32853
A
Unless
B
While
C
Until
D
Since
推荐题目
After studying mass of data，they drew a conclusion________China is still a developing country.
#30622
A
that
B
which
C
／
D
where
_______ we were studying abroad, we learned much about foreign culture and customs.
#31663
A
Since
B
While
C
After
D
During
Even though they are not doubtful at all _______ John will pass the exam, I still wonder ______ he is fully prepared.
#34809
A
whether; that
B
that; whether
C
that; that
D
whether; whether