The factory ______ its waste into the river, but now it deals with the waste in a new way.
–Carl, are you interested in swimming? --Yes, ___ I’m not good at it at all.
They arrived _____ Shanghai_____ the morning of May 2.
–Have you ever been to the zoo? ---__________
A young man _______John bought this expensive present.
---My grandfather is ill today. ---_________