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 ______.
#87593
A
ustn’t be
B
ay not be
C
an’t be
D
on’t be
推荐题目
Mum disagreed with my suggestion that we ________ skating this weekend.
#87282
A
would go
B
went
C
going
D
go
It is requested that each of the teachers invited a performance at the party.
#86984
A
should give
B
will give
C
has to give
D
must give
---I didn’t go to the party yesterday because my car broke down. ---You ______ mine. I wasn’t using it.
#87136
A
ought to borrow
B
would have borrowed
C
had better borrow
D
could have borrowed
—Why didn’t Susan come to school? —I don’t know. She____ ill.
#87988
A
could be
B
may have been
C
might
D
must have been
We ________ our lives had it not been for the policeman.
#89376
A
would have lost
B
should lose
C
might lose
D
had lost