试题题干
Fill in the blanks with an item as required.
With an appropriate conjunctive:
After the initial failure, they were faced with the problem
they should continue the experiment or not.
参考答案
试题解析
本题考查定语从句引导词的选择。先行词是名词problem，后面是they should……，根据逻辑分析可知，问题应该是“是否应该继续”，如果是“应该继续”那就不是问题了。所以要选一个可以表示“是否”的关系词whether。
句意：在最初的失败之后，他们面临着是否应该继续试验的问题。