托业考试

【单选题】


网考网参考答案：B
网考网解析：
[听力原文] (A) He’s taking some medicine. (B) He’s doing some research. (C) He’s searching for some chemicals. (D) He’s dropping the chemicals. document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>