完成句子(从下面所给词或短语中选出一个恰当的词，并用其恰当的形式填入句中，使句子的意思正确、通顺，每词限用一次)(满分5分)

小题1:Can you     these fat men climbing the mountain?

小题2:They    their journey because of the heavy rain.

小题3:This is the cause for which we have been   .

小题4:He       saw that he was mistaken.

小题5:----Have you nearly finished?

----        , I have only just begun.

1mol有机物能与1mol氢气发生加成反应，产物是2,2,3-三甲基戊烷，此有机物的结构简式可能有                                                     。