問(wèn)題補(bǔ)充：
單選題
He was so pleased with all ______ we had done for him _____ he wrote us a letter to praise us for it.A.what; whatB.what; thatC.that; whatD.that; that
網(wǎng)友答案：
熱心網(wǎng)友 1樓
D解析 all 做先行詞用that引導(dǎo)定語(yǔ)從句，what不可以引導(dǎo)定語(yǔ)從句。What相當(dāng)于一個(gè)名詞加that。第二空的that與so連接so…… that表示如此。。。。以至
