四六级考试

【单选题】
A、By looking through the keyhole.

B、By looking through the window.
C．By taking pictures of the monkey.
D．By hiding himself behind the box.

网考网参考答案：A
网考网解析：
[听力原文] How did the professor watch the monkey document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>