Trees ________ every year to make our city greener.

You’d better write down the name of the restaurant for further _______.

Chan’s restaurant on Baker Street, ______ used to be poorly run, is now a successful business.

______ twice, the postman refused to deliver our letters unless we chained our dog.

18. It is ______ that he has passed the examination, and I am _____ I will pass it too.