() 9. They will lose the game they try their best. (2014 黔西南)

   A. unless   B. once

   C. since   D. after

() 8. Don’t run in the classroom , you may hurt yourself. (2014 陜西)

   A. and   B. or

   C. but   D. so

() 7. He's not a perfect child. He sometimes talks back his parents talk with him. (2014 河南)

   A. if   B. before

   C. when   D. until

() 6. Diana isn't here, leave a message on her desk.

   A. or   B. so

   C. and   D. but

() 5. Eric arrived on time, it was the rush hour.

   A. although   B. because

   C. while   D. unless

() 4. It's going to rain.You,d better take an umbrella you may get wet.(2014長(zhǎng)沙)

   A. or   B. and

   C. but

() 3. Talk to your teacher and you will get help you have a problem.(2014山東臨沂)

   A. unless   B. if

   C. until   D. so

() 2. I won’t go to tomorrow's party I am invited.

   A. if   B. unless

   C. when

() 1. —I can hardly believe my eyes. Is that you,Lucy?

—Yes. It has been almost 20 years we were together.

(2014湖北黃岡)

   A. since   B. before

   C. after   D. until

() 15. —I really enjoy Chinese food!

—Me,too. My mouth was watering I watched the TV program A Bite of China. (2014 浙江湖州)

   A. when   B. before

   C. since   D. after