Do you know how to chat(聊天)_____ the Internet?[ ]

It’s _____ rather cold. I shall put my coat on.

Waiter, $ 20 for dinner, right?— I’m afraid $ 25, sir, for drinks are ________.

As a young man, there was __________ time __________ I hated to go to school .

You look frozen. Sit down by the fire and I ________ you some hot tea.