他喜欢在公园里观察鸟类的活动。

He enjoys ___watching the birds' activities in the park.

她每天都戴着这只手表，因为它很准时。

She wears this ___watch every day because it keeps perfect time.

过马路时要小心车辆。

___Watch out for cars when crossing the street.

士兵们在午夜换岗时交接了夜间的警戒任务。

The soldiers took over the night ___watch at midnight.