. Between the two rows of trees ____ the teaching building.
---- ____? ---- Maybe the possible solutions to the air pollution.
To my surprise, he was lost in thought then and not ____ of my presence at all.
When I met him the other day, it was the first time we ____ each other since we were at school.
Your performance in the driving test didn’t reach the required standard, ____, you failed.
She ____ her husband three years ago, and soon ____ a man with a lot of money.