用所给词的适当形式填空（6分）：

小题1:Who can jump the _________________ (far) in your class, Sandy, Lucy or Kate?

小题2:Chen Kaige is one of the famous ________________ (direct) in China.

小题3:The boy’s ________________ (die) is a great disaster to his parents.

小题4:There’s always a risk of getting killed, so the family has to move away to another city for ________________ (safe).

小题5:Shortly after, the ____________ (France) director told me that he had devoted his lifetime to the industry.

小题6:Chinese people have found out the ______________ (true) through many years’ struggle.

一项调查显示，某班参加极限训练的同学与那些未参加此项训练的同学相比，学习成绩一直保持较高的水平。此项调查得出结论：极限训练通过开拓学生的视野，能够增加学生的学习兴趣，激发学生的创造潜力，有效地提高了学生的学习成绩。
以下哪项，如果为真，最能加强上述调查结论的说服力

A．没有参加极限训练的同学如果通过其他活动开拓视野，也能获得好成绩。
B．整天在教室内读书而不参加课外科技活动的学生，他们的视野、学习兴趣和创造力都会受到影响。
C．没有参加极限训练的同学大都学习很努力。
D．参加极限训练并不以学习成绩好为条件。
E．参加极限训练的同学约占全班的半数。