Work hard you won’t do well in the exam.A. andB. butC. becauseD. or

问题补充：

Work hard, you won’t do well in the exam.

A. and

B. but

C. because

D. or

答案：

A. and

B. but

C. because

(答案→)D. or

解析：考查并列句。“努力，你就会在考试中表现优秀”