Nowadays, sending e-mails to each other has become a way ______________ what they think to others.
—How long has John been here? — Two years, _______ he still has no friends.
—Excuse me. Could you tell me ________? — Sorry, I am new here.
— ______ the earthquake in Yu shu is! — Yes, we should try our best to help them.
—Please read every sentence carefully. you are, mistakes you’ll make. —Thank you for your advice.
—May I swim here? — No, you _______. It is dangerous.