2000张字母，百度网盘资源。
资源目录（已打包压缩）
Letter of the Week A.pdf
Letter of the Week B.pdf
Letter of the Week C.pdf
Letter of the Week D.pdf
Letter of the Week E.pdf
Letter of the Week F.pdf
Letter of the Week G.pdf
Letter of the Week H.pdf
Letter of the Week I.pdf
Letter of the Week J.pdf
Letter of the Week K.pdf
Letter of the Week L.pdf
Letter of the Week M.pdf
Letter of the Week N.pdf
Letter of the Week O.pdf
Letter of the Week P.pdf
Letter of the Week Q.pdf
Letter of the Week R.pdf
Letter of the Week S.pdf
Letter of the Week T.pdf
Letter of the Week U.pdf
Letter of the Week V.pdf
Letter of the Week W.pdf
Letter of the Week X.pdf
Letter of the Week Y.pdf
Letter of the Week Z.pdf