________what has recently been done to provide more buses for the people，a shortage of public vehicles remains a problem.
A：Except for
B：Due to
C：Because of
D：In spite of
3a＝b，（a、b都是非0自然数），a和b的最大公因数是（ ）。
“哀民生之多艰”、“风声鹤唳，草木皆兵”、“怒发冲冠”、“漫卷诗书喜欲狂”所表现的情绪顺次是（ ）
