题目

I worked so late in the office last night that I hardly had time＿＿＿ the last bus. 　　A.catching B.to catch 　C.having caught D.to have caught   答案： B 由题意“暴露在阳光下太久,会伤害人的皮肤”可知应采用-ing形式的被动式作主语。

查看本题答案和解析