Question

1.A shortage of public vehicles remains a serious problem___

Answer 1

1 如果用though的话 没有主语不能直接＋谓语has recently been done

而in spite of后＋名词这里就是 what 引导的从句

2 应该是C吧 would rather do A than do B是个固定用法 意思是宁愿做...而不愿...