It wasn’t until the 20

Alice, is this your pen? I need one to write down the name of the book. — No, it isn’t . ________ is over there on the desk.

Could you help me_______ when the plane will take off on the Internet ?—— I’m sorry , my computer doesn’t work.

As everybody knows，a person I s，the more things he needs to do tomorrow.

Are you going to be able to __________this summer?