The bus hit against a tree in the fog and ______to the deep valley，with ten passengers killed and twenty wounded.

— People says your little brother has been admitted into Qinghua University. — Yes. Never ________ he could achieve so much success.

 _______, they had no chance of winning the war.

None of them could understand your meaning, _________?

(2013·江苏，27)“Never for a second，”the boy says，“________that my father would come to my rescue.”