单项选择题______ are among the most influential newspapers in ______.
单项选择题Apart from the majority of countries, the U. K. has ______ to form the whole part of its constitution.
单项选择题Why should governments ensure the careful handling and recycling of the CFCs now in use
单项选择题The best way to save ozone is ______.
单项选择题At first, locomotives could not popularize themselves because they ______.