______ Bob had traveled around Europe and America．在他的青年时代鲍勃就已游历了欧洲和美国。
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Sophia is too ______ to be a good actress．索菲亚太害羞了，不能成为一个好演员。
His last year's trousers are now outgrown and need ______．去年的裤子他已经穿不得了，需要加长一点。
The whole nation was ______ when news came that China's first man-made satellite had been succes
火焰除锈金属表面预处理质量等级为（）。
A. F1
B. Pi
C. Sa3
D. Sal
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