—Who broke the window yesterday?
— ______ Jack ______ Mike. It was Jim.

I really enjoyed your talk, ________ there were some parts I didn’t understand.

---Would you like to go to the amusement park?
--- If Jim does, _____.

--What do you think of our school basketball team?
--- They’re going to lose the match           they improve their game.

Hurry up,          you will get to school on time.

- May I go to the movies with you?
- I'm afraid not ，        you have a ticket, because I have only one.
A． if                    B. unless                C. though

Mr. Black is rich, __________ he is not happy.
A. and            B. or             C. but

It’s widely known that you won’t achieve success _____ you work hard.

You can’t believe how terrible the fire is __________ you see it with your own eyes.

- Could you give me a hand?
- Well, please tell me_______ it is first.