He flashed me a quick smile but rapidly swallowed it___________ he saw my expression.
A.when. B.unless. C.if D.until
A special committee of scientists___________ to study AI's effects on economy in the years ahead.
A.have established. B.will be established. C.are established. D.is establishing
___________ many different viruses, wildlife can potentially infect human beings and should be banned for trade.
A.To carry. B.Carried. C.Having been carried D.Carrying.
She and her best friend felt sad when they heard I__________ for New York the next day
A.had left. B.was leaving. C.left. D.has left.
The beautiful scenery was_________ before the travelers when they reached the top of the hill.
A.laid out. B.given out C.sent out. D.turned out.
假设你是李华，你准备参选你校英语口语俱乐部主席一职，请你写一篇英语演讲稿，进行竞选演讲。内容包括：
1. 竞选职位；
2. 个人优势；
3. 当选设想。
注意：1. 词数100词左右；
2. 开头已给出，但不计入词数；
3. 可以适当增加细节，以使行文连贯。
Dear teachers and students, may I have your attention please?
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