问题

One can’t be successful ________ he or she keeps working hard.—I agree with you.

A:although
B:unless
C:because
D:if;

正确答案是：

同类题型

I am always ________ to speak in the front of the classroom.

The visiting professor gave us some advice, ____ of great help to our English learning.

and short of breath, Andy and Rubywere the first to reach the top of Mount Tai

The uniform makes us look like a bunch of clones, especially _______ we are doing morning exercise in the playground

Andy is really _______ honest boy.—Yes. That’s why he is _______ most popular student in his class.