下列加点的词语中，读音全都相同的一组是（ ）

They often help kids ________ dancing.

Having lived in China for 8 years, Helen has a good ________ of both English and Chinese.

_______ makes the people in Shanghai proud is _______ they have achieved a lot in the past ten years.

Although the wind has ________，the rain remains steady，so you still need a raincoat.