I'm afraid we can't work out the math problem________the teacher helps us.
That's true. It's too difficult.( )
A. |
if |
B. |
unless |
C. |
because |
D. |
as soon as |
I'm afraid we can't work out the math problem________the teacher helps us.
That's true. It's too difficult.( )
A. |
if |
B. |
unless |
C. |
because |
D. |
as soon as |