【chistine613】評論
It wasn’t until the fall of the empire inn1991 that entering the area became possible for historians. 直到1991年王室衰弱後,歷史學家才有機會得以進入這個地區It is …..that ….子句用法很多人會看到before/after/upon Ving就會選但這句是使用that+子句的用法,只是用動名詞當主詞要小心不要被騙了(A) before (B) after (C) uponnnnnnnnnnnnnnnnnnn(D) that