【答案】I saw Daniel _______videos when I walked past his house.

I saw Daniel _______videos when I walked past his house.

A. watch B. was watching C. has watched D. watching

【答案】

D

【解析】

句意：当我步行经过丹尼尔家时，我看到他正在看视频。考查see sb. doing sth.表示看到某人正在做某事。故选D。