______ you keep trying till the end, you will never know how strong you are!
#55142
A
Although
B
If
C
Unless
D
Because
推荐题目
It’s widely known that you won’t achieve success _____ you work hard.
#55267
A
unless
B
whether
C
if
D
until
I enjoyed your lecture very much, ______ there were some parts I couldn’t quite understand.
#55770
A
because
B
unless
C
after
D
though
_________ people were watching the sky, the alien got out of the UFO.
#57263
A
If
B
When
C
Because
D
While