-What do you think of the traffic in our city?-lt's    than it used to be, but there's still a long way to go.

— How was your trip to the park?— It couldn’t be_____. We lost our way and it kept raining. 

I had to call a taxi because the box was ______ than I’d expected.

I think there will be _____ people and ______pollution.      

Nanjing is not so large_______ Shanghai, however, it's the second_______ city in East China.