---Sorry for being late again.---__________here on time next time, or you’ll be punished.
Whatever happens, Tom, ________ drugs.
That hazy（雾霾）weather has hit 104 cities in middle-east China lately makes citizens well aware of ______a terrible problem China is faced with.
______ it is to learn English on the internet!
__ mix these things together.
_____terrible weather we’ve been having these days!
