Question

【題目】The young couple, who returned my lost wallet, left ______I could ask for their names.
A.while
B.before
C.after
D.since

Answer 1

【答案】B
【解析】句意：在我問他們的名字之前，這對年輕夫婦返還了我的錢包就離開了。所填詞引導(dǎo)時間狀語從句，意思是“在……之前”，選B。