7. The grass is very wet, ______ it has been raining for several days now.
A. as B. so C. when D. while
8. Please have another cup of tea ____ you go.
A. while B. when C. since D. before
9. _____she was frightened, Clara did not run away from the dog.
A. After B.Although C. When D. Because
10.___ Lisa has been waiting outside the studio for a long time, she still cannot get Andy's autograph.
A. When B. So C. Even though D. While