354には悪いけどwantの補文はCPだ
... wants [CP C [TP you T=to [VP t/you [V' V=study [DP [D' D=a [NP [N' [AP A=new ] N=language ]]]]]]]]


5. [CP C=for [TP Maurice [T’T=to [VP t/Maurice [V’ V=quarrel [PP P=with Joel ]]]]]]
6. [CP C [TP [DP John’s [D’ D [NP N=drums ]]] [T’ T=will [VP Adv=always [VP t/John’s drums [V’ V=bother [DP me ]]]]]]]

(5, 6)はいわゆる心理動詞で、出題者の意図はBelletti & Rizzi の非対格分析を
答えさせようというのかも知れない
その場合は X frightens Y なら
[VP [V’ [V’ V=frightens X ] Y ]]
からXを文主語位置Spec-TPへ移動させる