单项选择题

Which of the following is difficult for robots to do at present

A．To assemble machines.
B．To do some kinds of cleaning.
C．To work as service men.
D．To tell that the corner where walls and ceilings meet goes in, not out.
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问答题
Four score and seven years ago our fathers brought forth on this continent, a new nation, conceived in Liberty, and dedicated to the proposition that al] men are created equal. Now we are engaged in a great civil war testing whether that nation or any nation so conceived and so I dedicated ,can long endure. We are met on a great battle field of that war. We have come to dedicate a portion of the field, as a final resting place for those who gave their lives that that nation might live. It is altogether fitting and proper that we should do this. But, in a larger sense, we can not dedicate--we can not consecrate --we can net hallow --this ground. The brave men, living and dead. who struggled here, have consecrated it ,far above our poor power to add or detract. The world will little note .nor long remember what we say here ,but it can never forget what they did here. It is for us the living, rather, to be dedicated here to the unfinished work which they who fought here have that for so nobly advanced. It is rather for us to be here dedicated to the great task remaining before us -- that from these honoured dead we take increased devotion to the cause for which they gave the last full measure of devotion-- that we here highly resolve that these dead shall not have died in vain-- that this nation, under God, shall have a new birth of freedom--and that government of the people, for the people, by the people shall not perish from the earth.
填空题
改“medicines”为“medicine”
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