問題詳情
34. First _______ for homeschoolers, the self-taught learning tutorials are extremely popular.
(A) developing
(B) to develop
(C) develop
(D) developed
參考答案
答案：D
難度：適中0.454545
統計：A(23),B(2),C(7),D(35),E(0)
用户評論
【翔姊】評論
原句:The self-taught learning tutorials were first develped for homeschoolers, (now) they are extremely popular (to other people).