高考考试

【单选题】______ my return, I learned that Professor Smith had been at the Museum and would not be back for several hours.
A、At
B、With
C、On
D、During

网考网参考答案：C
网考网解析：
[解析] on用来指时间，表示“在……之时”，相当于at the same time of，后跟动名词或表示动作的名词，例如：On his arrival in Qingdao, he set to work in earnest. 一到青岛他就认真地干了起来。而at，with和during则没有这种用法。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>