【单选题】______, the guest speaker was ushered into the auditorium hall to give the lecture.
A.
Being shown around the campus
B.
Having shown to the campus
C.
After been shown around the campus
D.
Having been shown around the campus
【单选题】一例全麻下行腹腔镜下子宫肌瘤挖出术,术中麻醉医师发现病人的气道压升高,心率加快,口腔分泌物增多,此时应该
【单选题】Imagine a guest speaker is to give a lecture and you're the one to make the speech of introduction. Which of the following goes first?
A.
Welcoming the audience
B.
Welcoming guest speaker
D.
Introducing guest speaker