—Did you have a good time at the party?

—Yes. We sang ______danced until late at night.

　　 A. but　　　　　 B. if　　　　　　 C. and　　　 D. so

 You have coughed for several days, Bill. Stop smoking,________ you’ll get better soon.

  A. but           B. after                C. or             D. and

Hurry up, _________ you will be late for class.

A. and   B. or    C. but     D. so

He didn’t go to school yesterday _______ he was ill.

A. because  B. because of     C. if     D. so  

- Where is Leo？ He said he would come tonight!

- Yes, he did say so, _____ we can’t find him now.

　　A. and B. so C. but D. or

 We can talk with friends on the Internet _______ it’s easier and cheaper.

    A. though       B. as           C. or           D. but

—Do you like sports?

—Yes, I do some running in the park everyday _______ the weather is terrible.

    A. if               B. after            C. unless           D. while

I'm sorry to have you waiting so long for Marcia, and I'm afraid it'll be ten minutes             she comes back.

A. before   B. after   C. until

 Making friends is not easy. Sometimes it can take years      you become true friends with someone.

 A. before    B. after    C. because    D. Unless

My sister has practiced tennis for a long time. She plays tennis _____ you.

             A. as good as               B. so well as                C. as well as