So far no life has been found outside the earth, but while some scientists are actively searching for living things in outer space, others firmly believe there ____ .
| A．mustn’t be | B．may not be |
| C．can’t be | D．won’t be |
推荐试卷
So far no life has been found outside the earth, but while some scientists are actively searching for living things in outer space, others firmly believe there ____ .
| A．mustn’t be | B．may not be |
| C．can’t be | D．won’t be |
试题篮
()
粤公网安备 44130202000953号
