冬日清晨，树木的影子被拉得很长。

The ___shadows of the trees are long on a winter morning.

大树在草地上投下长长的影子。

The big tree cast long ___shadows on the grass.

她的脸上没有一丝怀疑的痕迹。

There wasn't a ___shadow of suspicion on her face.

记者秘密跟踪那位政客好几天了。

The journalist has been ___shadowing the politician secretly for days.