—Whatwereyoudoingwhenhe

問題詳情：

—What were you doing when he ________“hello”to you?

—I _______in front of the blackboard.

A. was saying; read                 B. was saying; was reading

C. said; read                           D. said; was reading

【回答】

D

知識點：動詞時態

題型：選擇題