（湖南省怀化市2014年高三第二次模拟考试）25. ______ all of you are top students, only one will be chosen for the coming competition.

In the face of danger, we need to stay ____. Only in this way can we come up with good solutions.

When we practice English speaking, we often end up in Chinese.

Is that Mr．Smith over there? —– No, it _____ be him — I am sure he is much taller.

I ______ the help of my colleagues in thepreparation of this new column.