例句：
She is in little doubt that the condition has a genetic base and is not caused by upbringing.
她毫不怀疑这种状况是又遗传引起的，而绝不是后天教育的结果。

count on…
依靠……；指望……
 
例句：
They are counting on selling at least 5,000 copies of this film.
他们指望着这部电影至少卖5,000个拷贝。

What's the deadline?
截止到什么时候？ 

对话：
A: Mr.Brown, can I put off my final paper until next week?
B: I'm afraid you can't.
A: Then, what's the deadline?
B: This afternoon.