Voices were _____ as the argument between the two motorists became more bad-tempered.
-- In the countryside you can enjoy fresh air, blue sky and quiet surroundings. --- _______ more and more retired people are escaping from the crowded city.
— Remember the first time we met, Jim? — Of course I do. You _______ in the library.
I always prefer _______ a bike rather than _______ to work.
When you read the book, you’d better make a mark _____ you have any questions.
AIDS is said _______ the biggest health challenge to both men and women in that area over the past few years.