答案：We should work hard at English.
或 We should do well in English.
We should be good at English.
We should try our best to learn English.
有不明白的请继续追问,是We should learn English well =We ______ _______ _______learn English well填 are supposed to即：We are supposed to learn English well.解析：be supposed to do sth 应该做某事