完成句子 根据提供的意思，完成句子。（共10分，每格0.5分）
他病得如此严重以致他是否回来还不清楚.
He is so seriously ill that ___ was not clear ____   ____   ____ he will come.
太空飞船使我们到月球旅游成为可能.
Spaceship ______  ________  ________  for us to travel to the moon.
由于核辐射,很多日本人担心安全问题.
______   _______    ______    _______ nuclear radiation, many Japanese are worried about safety.
我正要说出真相这时他打断我.
I ______   ______    ______ tell the truth  _____  he interrupted me
老师不允许学生考试作弊逃脱惩罚.
The teacher won’t _____ students ______   ______   ______   _______ in the exam.