顺序练习
话题练习
题型练习
口语评分
写作评分
阅读机考
听力机考
口语机考
A.
He studied birds in their natural habitats.
B.
He tracked birds along their migration paths.
C.
He closely studied other illustrated books.
D.
He provided the printer with detailed instructions.
正确答案:AD
译文