—According to my mother it is a good idea to have some chicken soup when you have a cold

问题补充：

—According to my mother, it is a good idea to have some chicken soup when you have a cold．

—, scientists agree with her．

A. Sooner or later

B. Once in a while

C. Believe it or not

D. To be exact

答案：

A. Sooner or later

B. Once in a while

C. Believe it or not

D. To be exact

解析： 考查交际用语。Sooner or later迟早，Once in a while偶尔，Believe it or not信不信由你，To be exact确切的说，句意：根据母亲的说法，当你感冒的时候喝一些鸡汤是一个好主意。信不信由你，科学家们也同意她的观点。故选C。