—It’sdowntoyoutopickupthelecturertogiveusthereporttomor...

問題詳情：

—It’s down to you to pick up the lecturer to give us the report tomorrow.

—Yes. But how can I pick him out _______ I’m in the dark about his appearances?

A. while                         B. though                    C. once                       D. when

【回答】

D

知識點：連詞

題型：選擇題