Lily and her sister look the same. I can’t tell onefrom_______.

He was very careless in his work, so he really __________ to be fired.[ ]

_____banning trucks in the city centre because it will reduce air pollution and noise.

Only after his friend came _______.

You look so worried, what’s wrong—More and more people like me become to worry aboutthe __________ pollution after the haze (雾霾)appeared in Beijing and some other cities in China.