解析：______ his return from Japan, Prof._考试试题_高考

【单选题】______ his return from Japan, Prof. Li went directly to his laboratory and started working with his colleagues.
A、Upon
B、At
C、Within
D、Over

网考网参考答案：A
网考网解析：
[解析] 本句意为“李教授一从日本回国就立刻进入实验室开始与同事们一起工作。”“upon (on) +表示行为的名词”相当于as soon as引导的时间状语从句。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>