Although there is no life on Mars now , some scientists think that there some form of life a long time ago .
A. must be
B. may have been
C. can have been
D. could be
Although there is no life on Mars now , some scientists think that there some form of life
答案:2 悬赏:80 手机版
解决时间 2021-02-03 20:32
- 提问者网友：兔牙战士
- 2021-02-03 15:27
最佳答案
- 五星知识达人网友：归鹤鸣
- 2020-10-28 07:33
A. must be(答案→)B. may have beenC. can have been D. could be解析：可联系答.案.网客服索取。
全部回答
- 1楼网友：怀裏藏嬌
- 2020-09-26 19:15
我好好复习下
我要举报
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
大家都在看
推荐资讯