In the past, many rivers were ______________(污染) seriously, but now they are cleaned up.
When the door ___________ (最后) closed on him, he realized that he was refused rudely.
___________ (领导) by President Xi Jinping, the Chinese people are fighting against the spread of the COVID-19 through China.
My mother's __________(四十)birthday is coming soon. I want to give her a pleasant surprise.
Because of the COVID-19, this year's summer holiday will not start until the middle of __________(七月).
The ____________ [mjuˈziːəm] was quite a peaceful place, we sat down in the main hall and listened to the rain beating against the windows.
