The police still haven' t found her, but they' re doing all they （）

单项选择题Nobody but Jane ______ the secret.

单项选择题The issue is how to ______ of radioactive waste.

单项选择题There would be not a good harvest of wheat in North China this year（）the big snow.

A. in spite of
B. apart from
C. due to
D. in case of

单项选择题In our class, when the bell rang and the teacher closed his book, it was a ______ for everyone to stand up.

单项选择题This coastal area ______ a national wildlife reserve last year.