答案是：C
還原為主動(dòng)語(yǔ)態(tài)：
He has made such a good effort in his spare time that his English has improved a lot.這是個(gè)結(jié)果狀語(yǔ)從句．such．．．that結(jié)構(gòu)
如以下例子：
This is such a difficult problem that all of us can't work it out.句中,that是從屬連詞,引導(dǎo)結(jié)果狀語(yǔ)從句,在從句中不作成份.
This is such a difficult problem as all of us can't work out.句中,as 是關(guān)系代詞,引導(dǎo)定語(yǔ)從句,在從句中作賓語(yǔ).（注意這個(gè)句子里面沒(méi)有上一句的it這個(gè)賓語(yǔ)）
竅門(mén)：解這類(lèi)題的關(guān)鍵是看后面有沒(méi)有差賓語(yǔ),如差,則用such as 否則用such that．
祝你英語(yǔ)成績(jī)進(jìn)步!