1. Most Americans thought that Mark Twain was both humorous and bitter.
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比例是____与 ____的比值,在画图时应尽量采用____比例,必要时可采用放大或者缩小比例,1:10为 ____比例,10:1为 ____比例。
I wish I _____ the meeting last week.
A. could attend
B. attended
C. have attended
D. could have attended