Thousands of foreigners were attracted to the Shanghai World Expo the day it opened.这个句子为什么在attracted后为to不是by

Tens of thousands of Chines students have gone to foreign countries to study.翻译一下句子 数词Every year _________ foreign friends come to visit China.A.tens of thousads of B.thousand thousands ofC.thousands upon thousand D.over ten thousands thousands of thousands是什么意思 thousands of thousands of thousands of. thousand 、thousands、thousands of区别 thousands of tens of thousands of hundreds of thousands of Tens of thousands of hundreds of thousands of thousands and thousands of 和thousands of的区别 thousands and thousands of与thousands of的区别? tens and thousands of thousands of people Hundreds of thousands tens of thousands tens hundreds of thousands