Twenty-five percent of the water in this river _____ dirty in the past.A. is B are C. was D. were
There will be _______________ pollution this year than last year.
I was very surprised____ that my homework was left at home.
_____it was looking at the souvenirs, the shop assistant called the police.
Lana said she wasn’t mad Marcia .
Lana thinks she to my house .