好像没什么大问题。
第四题忘记加s。
4） We hummed a tune like the clowns.
至于第二题，你的应该比较正确。
“I dreamt of you” is very general. It could mean that the other person appeared briefly or that he or she was in a long dream. “I dreamt about you” generally means that the other person was the main character in one or more dreams.
至于第三题，我觉的 to 或 towards 都可以。
Toward is used to express a motion or direction toward something in the direction of something. （也就是有表示用方向或动态往一个有方向的东西前进）。 To normally used with a verb showing movement and shows the result of the movement. （和 towards 很相似，就是有显示结果。）
Toward is used to express a motion or direction toward something in the direction of something. （也就是有表示用方向或动态往一个有方向的东西前进）。
To normally used with a verb showing movement and shows the result of the movement. （和 towards 很相似，就是有显示结果。）
