记者秘密跟踪那位政客，试图获取独家新闻。

The reporter ___trailed the politician secretly, trying to get an exclusive story.

那辆旧卡车在车流中缓慢地行进，逐渐落在后面。

The old truck moved slowly through the traffic and eventually ___trailed behind.

他的围巾在风中飘动，拖在身后。

His scarf fluttered in the wind, ___trailing behind him.

随着时间推移，观众的兴趣逐渐减弱了。

The audience's interest ___trailed off as time went by.