题目

Name Thing Color Alice quilt yellow and white Bob jacket blue Cindy ruler red Helen pen green Frank key black 1. Alice has a _______________.   A. key       B. ruler      C. quilt      D. jacket2. Bob’s jacket is ______________.   A. red       B. blue       C. yellow    D. green3. Is Cindy’s ruler white? A. No, it isn’t.     B. Yes, it is     C. No, it is.     D. We don’t know.   4. ____________ has a green pen.   A. Helen      B. Bob      C. Frank     D. Alice5. What color is the key? A. Black.      B.根据a=bc（a、b、c是不为0的自然数），可知a和b的最大公因数是（　　）A．aB．bC．cD．bc