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现在试试
说地道的美式英语
输入你平时说的英语，看美国人会怎么表达，这样会知道自己哪里说错了
Bay Area School Practice
Grade 4 & Grade 6 Midterm Tests
Timed first-semester midterm practice in Math, English, Social Studies and Science — 5 tests each. Missed questions go straight into your mistake notebook.