____ go downtown this afternoon, please post the letter for me（）
A. Had you
B. Were you to
C. If you did
D. Shall you
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n型半导体的基本特征为（）
A. EF＞Ei; n0Ei; n0＞p0
It is a critical commonplace now that American literature is based on a myth,____（）
A. the ancient Greek myth of Zeus
B. the British myth of the Saint Grail
C. the Biblical myth of the Garden of Eden
D. the legend of the Sleepy Hollow
It was not until January 1776 that a widely heard public voice demanded complete separation from England. The voice was that of__ , whose pamphlet Common Sense, with its heated language, increased the
A. Thomas Jefferson
B. Thomas Paine
C. George Washington
D. Patrick Henry
请根据下列提示回答问题，并录制视频上传（）
A. 1.自我介绍
B. 2. Q1: Can you drive or do you plan to driveWhy or why not
C. 3.观点陈述： Possible problems arise from the use of driverless cars
D. 4.配对讨论：Who will benefit most from driverless cars
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