这些天来，中国的大部分城市都遭受着严重的雾霾(smog)。来自汽车和工厂的烟雾可能是雾霾产生的主要原因。人们怀疑呼吸这样的空气是否安全。糟糕的空气对人们的情绪也有不良影响。如果我们不采取任何行动，要看见一片蓝天就会越来越难了。
The Party members should be （严格的）with themselves．
January and （二月）are the coldest months in Beijing．
With the development of society，people are used to searching for the （最新的）information on the Internet．
Paul is an excellent student at school．His performance always （使…满意）us．
Wolong Nature Reserve is in Sichuan Province，the （西部）of China．Travellers can watch giant pandas there．
粤公网安备 44130202000953号