You have failed two tests.You'd better start working harder, you won't pass the course.A.

You have failed two tests.You'd better start working harder, you won't pass the course.
A. and
B. so
C. but
D. or

A. andB. soC. but(答案→)D. or解析：考查“祈使句＋and/or＋陈述句”。因为祈使句与后面的陈述句所表达的内容是对立的关系，故用or(否则)。

这个问题的回答的对

如以上回答内容为低俗、色情、不良、暴力、侵权、涉及违法等信息，可以点下面链接进行举报！

点此我要举报以上问答信息