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
The captain urged that the mission ______ before dark.
#88032
A
must be finished
B
be finished
C
ought to be finished
D
was finished
—How’s your tour around the North Lake? Is it beautiful?—It be, but it is now heavily polluted.
#86402
A
will
B
would
C
should
D
must
______, there would be no point arguing any longer.
#86765
A
Was that true
B
If that was true
C
Should that be true
D
Could that be true
Nancy was very disappointed to hear the news. I wish I her about that.
#87424
A
hadn’t told
B
didn’t tell
C
wouldn’t tell
D
can’t tell
Tom’s boss told Tome that if he worked hard, he _____ have a rise.
#87797
A
may
B
ought to
C
can
D
shall