English is very important. You are supposedit well.A. learned B. learning C. to learn

问题补充：

English is very important. You are supposedit well.

A. learned B. learning C. to learn

答案：

解析：句意:英语是非常重要的。你应该把它学好。be supposed是一个固定句型，意为：被认为应该做某事。这是一个被动的结构，be supposed 后跟动词不定式，即be supposed to do sth.。故选C。