More than 20 people ________ in traffic accidents ________ last May.

Global warming is a big _______ for all and it’simportant to raise awareness about climate change.

There goes the bell. Hurry up, _______ you’ll belate for class.

It’s kind __________ Yao Beina to donate her corneas (眼角膜) _________ three people in need.

下列各句中，没有语病的一句是（ ）